Attachment 223724 Details for Bug 254639 – dtrace stack

dtrace stack

dtrace.out (text/plain), 337.64 KB, created by Kirill on 2021-03-31 06:04:42 UTC

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Description:

Filename:

MIME Type:

Creator: Kirill

Created: 2021-03-31 06:04:42 UTC

Size: 337.64 KB

patch

obsolete

>
>
>
>              kernel`userret+0x60
>                1
>
>              kernel`vm_phys_alloc_npages+0x1b0
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_object_split+0x5e0
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_copy+0x480
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`__mtx_lock_sleep+0xb0
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x19b1
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_lookup_le+0x21
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc+0x1
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_protect+0x341
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_page_alloc_domain_after+0x271
>              kernel`pmap_copy+0x4cb
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_pqbatch_submit_page+0x191
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page+0xe2
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x7b2
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_first+0x93
>              kernel`zone_import+0x69
>              kernel`zone_alloc_item+0x54
>              kernel`uma_zalloc_arg+0x38a
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_lookup_le+0x123
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x1a3
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x3b4
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_remove+0x84
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`get_pv_entry+0x1b4
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_reserv_extend+0xe7
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`free_pv_entry+0x27
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x1a7
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_populate+0x28
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_sx_sunlock_int+0x18
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_dequeue+0x1c8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`zone_fetch_slab+0x29
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_try_insert_pv_entry+0xd9
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pctrie_lookup+0x59
>              kernel`vm_fault+0x7de
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pctrie_lookup+0x59
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_first+0x9a
>              kernel`zone_import+0x69
>              kernel`uma_zalloc_arg+0x3c7
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_lookup_le+0x12a
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_alloc_page+0xa
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_activate+0xa
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x2aa
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x8b
>              kernel`pmap_enter+0x8c3
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x8b
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_copy+0x48b
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_reserv_alloc_page+0xc
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x4ac
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_promote_pde+0x47c
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pctrie_lookup+0x5c
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pctrie_lookup+0x5c
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`free_pv_entry+0x2d
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x19e
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_populate+0x12e
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_extend+0xee
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swp_pager_meta_ctl
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_lookup_le+0x130
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_try_insert_pv_entry+0xe0
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_page_alloc+0x11
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_page_alloc_domain_after+0x281
>              kernel`pmap_copy+0x4cb
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_page_alloc_domain_after+0x281
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x281
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x1a3
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_lookup_le+0x133
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_alloc_page+0x114
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`get_pv_entry+0xc4
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`keg_fetch_slab+0x25
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_activate+0x15
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_dequeue+0xd5
>              kernel`pmap_enter+0x3c9
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_pmap_allocpte+0x1f5
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_radix_remove+0x97
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`free_pv_entry+0x37
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domain_allocate+0x87
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x1b7
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_mtx_trylock_flags_+0x37
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_populate+0x139
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0xca
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swp_pager_meta_ctl+0xa
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_lookup_le+0x13a
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_mtx_trylock_flags_+0x3a
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x3cb
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_activate+0x1b
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`get_pv_entry+0xcb
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`swp_pager_meta_ctl+0xc
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x1bc
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_lookup_le+0x13d
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_radix_lookup_le+0x13d
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_populate+0x3d
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_sx_sunlock_int+0x2d
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`userret+0x17e
>                1
>
>              kernel`vm_domainset_iter_page_init+0x9e
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x1bce
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_alloc_page+0x1e
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`get_pv_entry+0x1ce
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_domainset_iter_policy+0x4f
>              kernel`uma_zalloc_arg+0x3c7
>              kernel`uma_zalloc_arg+0x38a
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`free_pv_entry+0x3f
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x1bf
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`lock_delay
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x1a0
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_promote_pde+0x490
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_populate+0x41
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_extend+0x1
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x7d2
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x19d2
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_policy+0x53
>              kernel`zone_alloc_item+0x54
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_lookup_le+0x43
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_phys_alloc_freelist_pages+0x64
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_alloc_page+0x124
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`free_pv_entry+0x44
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`userret+0x185
>                1
>
>              kernel`swap_pager_haspage+0x75
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x295
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_pqbatch_submit_page+0x3b5
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x19d6
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_extend+0x6
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x8c6
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`lock_delay+0x6
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x2a6
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_pqbatch_submit_page+0xb6
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_alloc_page+0x227
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_pqbatch_submit_page+0x3b7
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_remove+0xa8
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_reserv_alloc_page+0x28
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x4c8
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x5d9
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page+0xa
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x1bda
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_remove+0x1aa
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_promote_pde+0x49a
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page_init+0xab
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x9b
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0xdc
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x5dc
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`keg_fetch_slab+0x3d
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x2dd
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x8cd
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`get_pv_entry+0x1dd
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_radix_lookup+0x4e
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x49e
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault_lock_vnode+0xf0
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0xc0
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_radix_lookup+0x50
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x2d0
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`lock_delay+0x10
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`get_pv_entry+0x1e0
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_extend+0x11
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0xd1
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0xe2
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zfree_arg+0xa2
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_promote_pde+0x4a2
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x1d3
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page+0x14
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x8d4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0xe5
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swap_pager_haspage+0x85
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0xd5
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x11e7
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swap_pager_haspage+0x87
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_rename+0x167
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_page_alloc+0x37
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`VOP_INACTIVE_APV+0x8
>              kernel`namei+0x414
>              kernel`kern_statat+0x72
>              kernel`sys_fstatat+0x2f
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`zone_fetch_slab+0x59
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`lock_delay+0x19
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page+0x1a
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_activate+0x3a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_pmap_allocpte+0x1a
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0xba
>              kernel`pmap_enter+0x8c3
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zfree_arg+0x5aa
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_lookup_le+0x15b
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_extend+0x1b
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zfree_arg+0xab
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0xcc
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x5dc
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`get_pv_entry+0x1ec
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page_init+0xbd
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_extend+0x1d
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`unlock_and_deallocate+0xe
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_alloc_page+0x3e
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x1aef
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_lookup_le+0x15f
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`trap_pfault+0x21f
>                1
>
>              kernel`vm_fault+0x5f0
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swap_pager_getpages+0x4c0
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_object_split+0x320
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_page_dequeue
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0xf1
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_phys_alloc_npages+0xf1
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_alloc_page+0x41
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`free_pv_entry+0x61
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_try_insert_pv_entry+0x11
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`spinlock_exit+0x31
>                1
>
>              kernel`spinlock_exit+0x31
>              kernel`kern_select+0x91a
>              kernel`sys_select+0x56
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_map_lookup+0xb2
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0xd3
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_alloc_page+0x43
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc+0x43
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zfree_arg+0x5b3
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_fault_lock_vnode+0x4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_alloc_page+0x144
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              dtrace.ko`dtrace_trap+0x4
>                1
>
>              kernel`vm_page_alloc_domain_after+0xb4
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`trap_pfault+0x26
>                1
>
>              kernel`swap_pager_getpages+0x4c7
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`trap+0x117
>                1
>
>              kernel`pctrie_lookup_le+0x197
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x7f8
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`__mtx_lock_sleep+0xf8
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`zone_import+0x89
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_lookup_le+0x169
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_page_alloc+0x49
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`uma_zfree_arg+0x5b9
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zfree_arg+0x5b9
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_phys_free_pages+0x9a
>              kernel`pmap_enter+0xb81
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_rename+0x7a
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`__rw_wlock_hard+0x18b
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_copy+0x4cb
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_domainset_iter_page_init+0xcc
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x3fc
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x5fc
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault_lock_vnode+0xc
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domain_allocate+0xbd
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0xed
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`zone_import+0x18e
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_extend+0x2e
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_pqbatch_submit_page+0x3de
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_map_lookup+0xfbf
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page+0x30
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_object_set_writeable_dirty+0x40
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_reserv_rename
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`uma_zalloc_arg+0x3d0
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_rename+0x1
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_enter+0x8f1
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swp_pager_meta_ctl+0x42
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`lock_delay+0x32
>              kernel`vm_page_alloc_domain_after+0x118
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page_init+0xd3
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_pqbatch_submit_page+0x3e3
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_map_lookup+0xfc3
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`rangeset_lookup+0x4
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x1f4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x3f4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_remove+0xd5
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_page_dequeue+0x15
>              kernel`keg_fetch_slab+0x12d
>              kernel`zone_fetch_slab+0x61
>              kernel`zone_import+0x69
>              kernel`uma_zalloc_arg+0x3c7
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_dequeue+0x15
>              kernel`keg_fetch_slab+0x12d
>              kernel`zone_fetch_slab+0x61
>              kernel`zone_import+0x69
>              kernel`zone_alloc_item+0x54
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_dequeue+0x15
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x8f5
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`__mtx_lock_sleep+0x105
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page_init+0xd6
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`dump_add_page+0x26
>              kernel`zone_fetch_slab+0x61
>              kernel`zone_import+0x69
>              kernel`zone_alloc_item+0x54
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zfree_arg+0x5c6
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0xc7
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`lock_delay+0x37
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_pqbatch_submit_page+0x3e7
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_map_lookup+0xfc7
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`get_pv_entry+0x8
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`rangeset_lookup+0x9
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`unlock_and_deallocate+0x29
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_rename+0x189
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_try_insert_pv_entry+0x29
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_map_lookup+0x9c9
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`zone_import+0x19a
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`lock_delay+0x3a
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_mtx_trylock_flags_+0x7a
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_remove+0xdb
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_page_alloc+0x5b
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`get_pv_entry+0x20b
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zfree_arg+0x5cb
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`__mtx_lock_sleep+0x10c
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`zone_import+0x19d
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x1fd
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_map_lookup+0xcd
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page_init+0xde
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x10e
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault_lock_vnode+0x1f
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_extend+0x40
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc+0x60
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`get_pv_entry+0x210
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_copy+0x4e0
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_map_lookup+0xd0
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`lock_delay+0x41
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`__mtx_lock_sleep+0x113
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x7e4
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x7e4
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`lock_delay+0x46
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page_init+0xe8
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`free_pv_entry+0x188
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x208
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zfree_arg+0x5d9
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x1a
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_object_deallocate+0x5da
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x10a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_map_lookup+0x9da
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_rename+0x19b
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_reserv_rename+0x1c
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_enter+0x20c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x7ec
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_extend+0x4e
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x7ee
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc+0x6f
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc+0x6f
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`lock_delay+0x4f
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_vm_map_trylock_read+0x30
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x21
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_pager_get_pages+0x1
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`unlock_and_deallocate+0x141
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x2e1
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x122
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_vm_map_trylock_read+0x32
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_rename+0x1a2
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_radix_insert+0x103
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_protect+0x1b3
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_object_deallocate+0x5e4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc+0x74
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x14
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x7f5
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_pager_get_pages+0x6
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x6
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_fault+0x1827
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0xf7
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_try_insert_pv_entry+0x47
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_fault+0x128
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`__rw_try_upgrade_int+0x8
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_vm_map_trylock_read+0x39
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`__rw_try_upgrade_int+0x9
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0xa
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_vm_map_trylock_read+0x3a
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`__rw_try_upgrade_int+0xa
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x12b
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_phys_alloc_npages+0x12b
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swp_pager_meta_ctl+0x16b
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_alloc_page+0x7b
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0xeb
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page+0x5d
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x72d
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_extend+0x5d
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_lookup_le+0x19e
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x3ee
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_object_reference_locked+0xf
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`trap_pfault+0x5f
>                1
>
>              kernel`vm_domainset_iter_page_init
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x320
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x21
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x1
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x732
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`trap_pfault+0x63
>                1
>
>              kernel`vm_map_lookup+0xf3
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`zone_import+0xc4
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_rename+0xb4
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_protect+0x5c4
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_enter+0x124
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x4
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`get_pv_entry+0x135
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page_init+0x6
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_dequeue+0x46
>              kernel`pmap_enter+0x8c3
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_copy+0x506
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_fault+0x1a37
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_phys_alloc_npages+0x137
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_map_lookup_entry+0x17
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x3f7
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page_init+0x8
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`zone_import+0xc9
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x73a
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swap_pager_getpages+0xa
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x92a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swp_pager_meta_ctl+0x17b
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swap_pager_getpages+0xc
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x10c
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pagezero_erms+0xd
>              kernel`zone_fetch_slab+0x61
>              kernel`zone_import+0x69
>              kernel`zone_alloc_item+0x54
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_rename+0xbd
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_fault+0x13e
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_object_reference_locked+0x1e
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x11e
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_map_lookup_entry+0x1e
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_first+0x1f
>              kernel`zone_import+0x69
>              kernel`zone_alloc_item+0x54
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_extend+0x6f
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pagezero_erms+0xf
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_protect+0x1cf
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_domainset_iter_page_init+0x10
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x640
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_map_process_deferred
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pagezero_erms+0x10
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x1
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domain_allocate+0x1
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_pmap_allocpte+0x371
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_try_insert_pv_entry+0x61
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`__rw_try_upgrade_int+0x22
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_pmap_allocpte+0x272
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_fault+0x1a43
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_phys_alloc_npages+0x143
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_copy+0x513
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_copy+0x613
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_invalidate_page_pcid_invpcid+0xd4
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`get_pv_entry+0x144
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_enter+0x135
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x6
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x127
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x127
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`free_pv_entry+0xb7
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x107
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc+0x99
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`PHYS_TO_VM_PAGE+0x1b
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`swap_pager_unswapped+0xc
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_remove+0x11c
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_reserv_extend+0x17c
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x3c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc+0x9d
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0xd
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_phys_alloc_npages+0x14f
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x81f
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`trap+0x6f
>                1
>
>              kernel`vm_map_lookup_done
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_rename+0xd0
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`uma_zalloc_arg+0x20
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`__mtx_lock_sleep+0x50
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`userret+0x1
>                1
>
>              kernel`__rw_rlock_int+0x1
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`memset_erms+0x32
>              kernel`zone_fetch_slab+0x61
>              kernel`zone_import+0x69
>              kernel`uma_zalloc_arg+0x3c7
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`memset_erms+0x32
>              kernel`zone_fetch_slab+0x61
>              kernel`zone_import+0x69
>              kernel`zone_alloc_item+0x54
>              kernel`vm_radix_insert+0x1bf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_pqbatch_submit_page+0x133
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`trap+0x73
>                1
>
>              kernel`vm_map_lookup_done+0x4
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_phys_alloc_npages+0x154
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swap_pager_getpages+0x24
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_map_lookup+0x14
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page_init+0x25
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x45
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_try_insert_pv_entry+0x75
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_map_lookup_entry+0x36
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x26
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_pqbatch_submit_page+0x37
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`userret+0x8
>                1
>
>              kernel`vm_reserv_extend+0x188
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_remove+0x129
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`get_pv_entry+0x59
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_object_pip_add+0xa
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`__rw_wlock_hard+0xea
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domain_allocate+0x1a
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_map_lookup_done+0xb
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x13b
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x2c
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_copy+0x42c
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_reserv_rename+0x5d
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_page_rename+0xdd
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_try_insert_pv_entry+0x7d
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_enter+0x14e
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0xa4f
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swap_pager_getpages+0x30
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pctrie_lookup
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pctrie_lookup_le
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x141
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`userret+0x12
>                1
>
>              kernel`vm_fault+0x62
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_extend+0x192
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_object_deallocate+0x23
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_phys_alloc_npages+0x63
>              kernel`vm_page_alloc+0x74
>              kernel`get_pv_entry+0x5e
>              kernel`pmap_try_insert_pv_entry+0x20
>              kernel`pmap_copy+0x4cb
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`uma_zalloc_arg+0x33
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swap_pager_haspage+0x4
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_alloc_page+0xb4
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`zone_alloc_item+0x54
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pctrie_lookup+0x4
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pctrie_lookup+0x4
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pctrie_lookup_le+0x4
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`userret+0x15
>                1
>
>              kernel`pmap_enter+0x155
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swap_pager_haspage+0x6
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pctrie_lookup+0x7
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`zone_import+0x1f8
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x168
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swap_pager_haspage+0x8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swap_pager_unswapped+0x28
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`0xffffffff81066bb8
>                1
>
>              kernel`vm_page_alloc_domain_after+0x28
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`__rw_rlock_int+0x18
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_zone_import+0x28
>              kernel`_pmap_allocpte+0xa3
>              kernel`pmap_copy+0x459
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_domainset_iter_page_init+0x39
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x159
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_try_insert_pv_entry+0x89
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`swap_pager_haspage+0xa
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_map_process_deferred+0x2a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swap_pager_haspage+0xd
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x570
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x150
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`swap_pager_copy+0x2e0
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`sx_try_slock_+0x30
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_promote_pde+0x430
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x771
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x152
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_page_alloc_domain_after+0x232
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`keg_fetch_slab+0x3d3
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page+0xa3
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_remove+0x143
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`zone_import+0x104
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page_init+0x44
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x35
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x965
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_promote_pde+0x235
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_first+0x56
>              kernel`pmap_enter+0x8c3
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x476
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_protect+0x206
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_fault+0x1978
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_pqbatch_submit_page+0x158
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_page+0xa9
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x579
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x159
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_fault+0x17a
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x47a
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`free_pv_entry+0xea
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x77b
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x16c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x15d
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_first+0x5e
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_first+0x5e
>              kernel`pmap_try_insert_pv_entry+0x20
>              kernel`pmap_copy+0x4cb
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_fault+0x47e
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_pmap_allocpte+0x2ae
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_map_lookup+0x3e
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x3f
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x4f
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x4f
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_domainset_iter_first+0x60
>              kernel`pmap_try_insert_pv_entry+0x20
>              kernel`pmap_copy+0x4cb
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_fault+0x1a80
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_protect+0x310
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`uma_zalloc_arg+0x51
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x51
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x751
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_rename+0x102
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_phys_alloc_npages+0x183
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x163
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_remove+0x153
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`get_pv_entry+0x183
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_pv_insert_pde+0xe3
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_domainset_iter_policy+0x4
>              kernel`zone_alloc_item+0x54
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x1b84
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_pqbatch_submit_page+0x64
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_pqbatch_submit_page+0x164
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x785
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x55
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x55
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x86
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x756
>              kernel`pmap_enter+0x8c3
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x167
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x167
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_page_rename+0x107
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`trap+0xa7
>                1
>
>              kernel`vm_fault+0x1b88
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x168
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_page_alloc_domain_after+0x248
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_pmap_allocpte+0x2b8
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`zone_import+0x219
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domain_allocate+0x49
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault_trap+0xa
>                1
>
>              kernel`vm_page_rename+0xa
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_domainset_iter_first+0x6b
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x75b
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault_trap+0xc
>                1
>
>              kernel`vm_radix_insert+0x16c
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault_trap+0xd
>                1
>
>              kernel`zone_import+0x11e
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x48e
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x16e
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x44e
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_pqbatch_submit_page+0x16e
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x170
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_lookup
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_lookup_le
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_radix_lookup_le+0x100
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_page_alloc_domain_after+0x51
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault_trap+0x12
>                1
>
>              kernel`vm_page_free_toq+0x62
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domain_allocate+0x52
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x293
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_phys_alloc_npages+0x194
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`__rw_rlock_int+0x44
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x984
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x64
>              kernel`pmap_try_insert_pv_entry+0x20
>              kernel`pmap_copy+0x4cb
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`uma_zalloc_arg+0x64
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x64
>              kernel`pmap_copy+0x459
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`pmap_promote_pde+0x454
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x455
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`get_pv_entry+0x195
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`userret+0x46
>                1
>
>              kernel`vm_domainset_iter_first+0x77
>              kernel`zone_import+0x69
>              kernel`zone_alloc_item+0x54
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_populate+0x7
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x69
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x69
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x69
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_page_zone_import+0x159
>              kernel`_pmap_allocpte+0xa3
>              kernel`pmap_enter+0x3c9
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_zone_import+0x159
>              kernel`_pmap_allocpte+0xa3
>              kernel`pmap_copy+0x459
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`__mtx_lock_sleep+0x99
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_populate+0xa
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`free_pv_entry+0xa
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`keg_fetch_slab+0xfb
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_pmap_allocpte+0x3cc
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_domainset_iter_policy+0x1d
>              kernel`zone_alloc_item+0x54
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x59d
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x1a9d
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_phys_alloc_npages+0x9d
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_populate+0xd
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x25d
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_cv_timedwait_sig_sbt+0x12d
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_radix_lookup_le+0x10e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_radix_remove+0x16e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`get_pv_entry+0x19e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`userret+0x4f
>                1
>
>              kernel`vm_fault+0x89f
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domain_allocate+0x60
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x290
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_phys_alloc_npages+0xa1
>              kernel`vm_page_alloc+0x74
>              kernel`get_pv_entry+0x5e
>              kernel`pmap_enter+0x8c3
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_alloc_page+0x2f1
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`_sx_sunlock_int+0x1
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_pqbatch_submit_page+0x381
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x192
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_first+0x83
>              kernel`zone_import+0x69
>              kernel`uma_zalloc_arg+0x3c7
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_first+0x83
>              kernel`zone_import+0x69
>              kernel`zone_alloc_item+0x54
>              kernel`uma_zalloc_arg+0x38a
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_rename+0x1a3
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_pqbatch_submit_page+0x183
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_enter+0x195
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x75
>              kernel`pmap_try_insert_pv_entry+0x20
>              kernel`pmap_copy+0x4cb
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_radix_lookup_le+0x116
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_radix_lookup_le+0x116
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_pqbatch_submit_page+0x86
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`userret+0x57
>                1
>
>              kernel`vm_fault+0xba7
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`free_pv_entry+0x17
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x67
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`uma_zalloc_arg+0x777
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`keg_fetch_slab+0x8
>              kernel`uma_zalloc_arg+0x38a
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_fault+0x5a8
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_phys_alloc_npages+0xa8
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_phys_alloc_npages+0xa8
>              kernel`vm_page_alloc+0x74
>              kernel`get_pv_entry+0x5e
>              kernel`pmap_try_insert_pv_entry+0x20
>              kernel`pmap_copy+0x4cb
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_object_split+0x5d9
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`uma_zfree_arg+0x69
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`vm_fault+0x8aa
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_rename+0x2a
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`free_pv_entry+0x1a
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`pmap_promote_pde+0x46b
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_radix_insert+0x8d
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`_sx_sunlock_int+0xd
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domain_allocate+0x6d
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`get_pv_entry+0x1ad
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                1
>
>              kernel`get_pv_entry+0x1ad
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_phys_alloc_freelist_pages+0x3e
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_domainset_iter_first+0x8f
>              kernel`zone_import+0x69
>              kernel`zone_alloc_item+0x54
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_page_alloc_domain_after+0x6f
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                1
>
>              kernel`vm_reserv_alloc_page
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`_sx_sunlock_int+0x11
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`get_pv_entry+0x1b2
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_domainset_iter_first+0x93
>              kernel`zone_import+0x69
>              kernel`zone_alloc_item+0x54
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_extend+0xe3
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_alloc+0x4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_alloc+0x4
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_object_split+0x5e5
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_page_alloc+0x6
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_radix_lookup_le+0x127
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_dequeue+0x1c7
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_enter+0x4a7
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`_sx_sunlock_int+0x18
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`get_pv_entry+0x1b9
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_promote_pde+0x479
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_alloc+0xa
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`uma_zalloc_arg+0x28a
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`get_pv_entry+0x1bb
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_reserv_alloc_page+0xd
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x7be
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_radix_insert+0x9e
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_try_insert_pv_entry+0xde
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`zone_import+0x150
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_enter+0x8b1
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_radix_insert+0xa2
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_radix_lookup_le+0x133
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`pmap_try_insert_pv_entry+0xe3
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_reserv_alloc_page+0x14
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_copy+0x494
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`pmap_protect+0x357
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`pmap_promote_pde+0x487
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_copy+0x497
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_radix_lookup_le+0x13a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`free_pv_entry+0x3a
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_alloc+0x1a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x5cb
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_promote_pde+0x48c
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_radix_insert+0xae
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`swp_pager_meta_ctl+0xe
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`pmap_protect+0x35e
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_reserv_extend+0xff
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_copy+0x4a0
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_fault_lock_vnode+0xe3
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_rename+0x1d3
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_page_rename+0x53
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_page_alloc_domain_after+0x97
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_promote_pde+0x497
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_copy+0x2a7
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_domainset_iter_page+0x8
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`swp_pager_meta_ctl+0x18
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_reserv_extend+0x8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_rename+0x1d8
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`pmap_enter+0xca
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_copy+0x4aa
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_fault+0x19dc
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault_lock_vnode+0xec
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_extend+0xc
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_rename+0x5c
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_reserv_extend+0xd
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_protect+0x36d
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`pmap_copy+0x4ad
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_fault+0x7de
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x3df
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`get_pv_entry+0xdf
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_radix_insert+0xc0
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_map_lookup+0xea3
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_enter+0x5d4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_copy+0x4b4
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_map_lookup+0xa4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x7e7
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`_sx_sunlock_int+0x47
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_alloc_domain_after+0xa8
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_try_insert_pv_entry+0x8
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_page_rename+0x69
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`pmap_protect+0x37a
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`swp_pager_meta_ctl+0x2b
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`pmap_copy+0x4bc
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_radix_lookup_le+0x15f
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_domainset_iter_page_init+0xc0
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x3f0
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_copy+0x2c0
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`pmap_copy+0x1c3
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_domainset_iter_page+0x24
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_try_insert_pv_entry+0x14
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`swp_pager_meta_ctl+0x35
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`trap_pfault+0x125
>                2
>
>              dtrace.ko`dtrace_trap+0x6
>                2
>
>              kernel`vm_page_alloc_domain_after+0xb7
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_enter+0x4e7
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`swp_pager_meta_ctl+0x38
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_page_rename+0x78
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_fault+0x1af9
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`trap+0x419
>                2
>
>              kernel`pmap_try_insert_pv_entry+0x19
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_domainset_iter_page+0x2a
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_extend+0x2b
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x6fc
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_copy+0x2cc
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_domainset_iter_page+0x2d
>              kernel`pmap_copy+0x4cb
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_map_lookup+0xbd
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_alloc_domain_after+0xbe
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`get_pv_entry+0x1ff
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_enter+0x4f0
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`lock_delay+0x30
>              kernel`vm_fault+0x1bd3
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`userret+0xb1
>                2
>
>              kernel`vm_fault+0x1
>                2
>
>              kernel`vm_page_alloc_domain_after+0x4c3
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x104
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`uma_zalloc_arg+0x7d4
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`rangeset_lookup+0x5
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`__mtx_lock_sleep+0x105
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault_trap+0x86
>                2
>
>              kernel`vm_reserv_rename+0x6
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`__mtx_lock_sleep+0x6
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_radix_lookup_le+0x178
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`pmap_promote_pde+0x3c8
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_domainset_iter_page_init+0xd9
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_extend+0x139
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`get_pv_entry+0x209
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x120a
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`0xffffffff8106a25a
>                2
>
>              kernel`pmap_enter+0x8fa
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_rename+0xd
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_reserv_alloc_page+0x5f
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_alloc_page+0x15f
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_activate+0x60
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_alloc+0x60
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`get_pv_entry+0x11
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x1214
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`get_pv_entry+0x14
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_map_lookup+0xd4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_extend+0x46
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`lock_delay+0x46
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x718
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`get_pv_entry+0x18
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`_vm_map_trylock_read+0x29
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_enter+0xa
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`zone_fetch_slab+0x8c
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_domain_allocate+0xdc
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`unlock_and_deallocate+0x13d
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_enter+0xd
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`uma_zalloc_arg+0x7ee
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_reserv_extend+0x14f
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_enter+0x30f
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_domainset_iter_first
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_alloc_page+0x170
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`get_pv_entry+0x20
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_page_alloc_domain_after+0xe2
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`uma_zalloc_arg+0x7f4
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`trap_check+0x4
>                2
>
>              kernel`vm_phys_alloc_npages+0x127
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_pv_insert_pde+0x87
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_pager_get_pages+0x8
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_domainset_iter_first+0xb
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x12e
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`swp_pager_meta_ctl+0x6e
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_pager_get_pages+0x10
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pagezero_erms
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_alloc_domain_after+0xf0
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`uma_zalloc_arg
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0xc31
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_extend+0x61
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_extend+0x65
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`_pmap_allocpte+0x265
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x36
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`zone_import+0x1c7
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_radix_insert+0x118
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_radix_remove+0x9
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`pmap_enter+0x2c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`uma_zalloc_arg+0xd
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_promote_pde+0x1fe
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`swap_pager_unswapped
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_map_lookup
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`PHYS_TO_VM_PAGE+0x12
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`swap_pager_getpages+0x14
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`swap_pager_unswapped+0x4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`PHYS_TO_VM_PAGE+0x14
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_domain_allocate+0x4
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_zero_page+0x16
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_map_process_deferred+0x6
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_alloc_domain_after+0x8
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x49
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_object_deallocate+0xa
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_alloc_domain_after+0x40a
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_object_deallocate+0xc
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_enter+0x93c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_map_lookup+0xa0c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x1a4d
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_radix_insert+0x2d
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`PHYS_TO_VM_PAGE+0x1d
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_page_rename+0xcd
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`uma_zalloc_arg+0x1d
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x150
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_map_lookup_done+0x1
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_object_pip_add+0x1
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_extend+0x81
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_alloc_domain_after+0x11
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x1a52
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x153
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_map_lookup_done+0x4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0xe54
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x1a55
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x56
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_promote_pde+0x416
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_extend+0x8a
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_phys_alloc_npages+0x15b
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x1b5d
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x45e
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`_sx_slock_int+0x2e
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_phys_alloc_npages+0x160
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`swap_pager_haspage
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_pqbatch_submit_page+0x40
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_rename+0x1e1
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_page_zone_import+0x121
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_map_process_deferred+0x22
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_rename+0xe4
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`pmap_enter+0x254
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pctrie_lookup+0x7
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`uma_zfree_arg+0x28
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`swap_pager_getpages+0x23a
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x56b
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_alloc_page+0x3bc
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`uma_zalloc_arg+0x3e
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`userret+0x21
>                2
>
>              kernel`vm_fault+0x1971
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`swap_pager_haspage+0x11
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`get_pv_entry+0x171
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_map_lookup+0x33
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x77
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_domainset_iter_page_init+0x48
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_alloc_page+0xc8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`free_pv_entry+0xe8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`uma_zalloc_arg+0x749
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`uma_zalloc_arg+0x749
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`__rw_rlock_int+0x2a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_object_pip_wakeup+0xb
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_enter+0x46b
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`uma_zalloc_arg+0x84b
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_radix_insert+0x15d
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`pmap_enter+0x96e
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`_pmap_allocpte+0x2ae
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_radix_insert+0x161
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_reserv_insert+0xb1
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`uma_zalloc_arg+0x751
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pctrie_lookup+0x23
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`sx_try_slock_+0x45
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_enter+0x375
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`get_pv_entry+0x186
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_enter+0x478
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_domainset_iter_page+0xba
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_extend+0xba
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x8b
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x1a8b
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`uma_zalloc_arg+0x75b
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_radix_insert+0x16c
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`pmap_enter+0x17c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_object_deallocate+0x4d
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_radix_insert+0x171
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_radix_lookup+0x1
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x692
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_extend+0xc3
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_phys_alloc_npages+0x94
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`free_pv_entry+0x4
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_map_lookup+0x54
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_domainset_iter_first+0x75
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x196
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault+0x1a96
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`sx_try_slock_+0x56
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_enter+0x186
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_fault_trap+0x18
>                2
>
>              kernel`vm_pqbatch_submit_page+0x78
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_zone_import+0x159
>              kernel`get_pv_entry+0x5e
>              kernel`pmap_enter+0x8c3
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_object_split+0x5ca
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_reserv_alloc_page+0xea
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`pmap_promote_pde+0x45b
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_alloc_domain_after+0x5c
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_rename+0x11d
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_radix_lookup_le+0xe
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`get_pv_entry+0x1a2
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`pmap_try_insert_pv_entry+0xc2
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_page_alloc_domain_after+0x63
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_alloc_domain_after+0x263
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`zone_import+0x134
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`_sx_sunlock_int+0x4
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_page_alloc_domain_after+0x464
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_populate+0x15
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`uma_zalloc_arg+0x75
>              kernel`pmap_enter+0x8c3
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`vm_reserv_alloc_page+0xf6
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`uma_zalloc_arg+0x777
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                2
>
>              kernel`vm_fault_trap+0x2b
>                2
>
>              kernel`vm_fault+0x19ac
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`zone_import+0x13e
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                2
>
>              kernel`trap_pfault+0x2de
>                2
>
>              kernel`vm_radix_remove+0x181
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`pmap_copy+0x484
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_radix_insert+0x95
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_radix_lookup_le+0x127
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_domain_allocate+0x79
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`uma_zalloc_arg+0x28a
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_radix_lookup_le+0x12d
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_page_alloc+0xd
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_page_alloc_domain_after+0x27d
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_fault+0x6c0
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_radix_lookup_le+0x130
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_object_set_writeable_dirty
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`swap_pager_haspage+0x61
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_promote_pde+0x482
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_fault+0xc3
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_fault_trap+0x45
>                3
>
>              kernel`vm_page_dequeue+0xd5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_fault+0x19c6
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_page_rename+0x46
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_object_set_writeable_dirty+0xb
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`pmap_copy+0x49d
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_reserv_extend
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`trap_pfault
>                3
>
>              kernel`vm_radix_insert+0xb4
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_reserv_extend+0x4
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_fault+0xd5
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`zone_fetch_slab+0x47
>              kernel`vm_radix_insert+0xdf
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_fault_trap+0x157
>                3
>
>              kernel`pmap_enter+0x1ca
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`trap+0x3fb
>                3
>
>              kernel`pctrie_lookup_le+0x17f
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_enter+0x4d0
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_try_insert_pv_entry
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_fault+0x19e1
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_enter+0x1d1
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_page_alloc+0x33
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_domain_allocate+0xa3
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`swp_pager_meta_ctl+0x25
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_radix_insert+0xc7
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`swp_pager_meta_ctl+0x28
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`swap_pager_getpages+0x4b9
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_radix_lookup_le+0x15b
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`pmap_enter+0xdc
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`trap_pfault+0x1d
>                3
>
>              kernel`free_pv_entry+0x5f
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`uma_zfree_arg+0xaf
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`pmap_enter+0x4e0
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_page_rename+0x72
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`pmap_copy+0x4c2
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`pmap_copy+0x2c3
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_radix_lookup_le+0x164
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_radix_lookup_le+0x164
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_page_dequeue+0x4
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_copy+0x4c6
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_fault+0x11f7
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_try_insert_pv_entry+0x17
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_radix_lookup_le+0x169
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`_vm_map_trylock_read+0x9
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_enter+0x8ea
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_fault+0xfb
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_promote_pde+0x4bc
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`uma_zalloc_arg+0x7cd
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_copy+0x4ce
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`rangeset_lookup
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`rangeset_lookup+0x1
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_object_set_writeable_dirty+0x41
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_page_alloc_domain_after+0xc1
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`lock_delay+0x32
>              kernel`vm_fault+0x8b
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_copy+0x4d2
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_reserv_alloc_page+0x53
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`get_pv_entry+0x206
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`trap_pfault+0x136
>                3
>
>              kernel`vm_fault+0x1b07
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`swp_pager_meta_ctl+0x47
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`lock_delay+0x3a
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_enter+0x4fe
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_enter
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_enter+0x1
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_enter+0x204
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_fault+0xc16
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`get_pv_entry+0x18
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_try_insert_pv_entry+0x39
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`trap+0x3a
>                3
>
>              kernel`get_pv_entry+0x1b
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`pmap_enter+0x111
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_phys_alloc_npages+0x123
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_reserv_extend+0x55
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`unlock_and_deallocate+0x46
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_radix_insert+0x8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_enter+0xb1c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`trap+0x4f
>                3
>
>              kernel`trap_pfault+0x61
>                3
>
>              kernel`swp_pager_meta_ctl+0x173
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_promote_pde+0x1f3
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_domainset_iter_page_init+0x9
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_promote_pde+0x1f9
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_try_insert_pv_entry+0x5a
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_radix_insert+0x11e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_pager_get_pages+0x1f
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_object_reference_locked+0x1f
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_page_lookup+0x1
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_map_lookup+0x1
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_reserv_alloc_page+0x99
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_enter+0x33a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_page_alloc_domain_after+0xc
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_map_lookup+0xd
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_copy+0x51e
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`pmap_copy+0x220
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_reserv_extend+0x87
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`trap_pfault+0x188
>                3
>
>              kernel`vm_reserv_alloc_page+0x3ab
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`uma_zalloc_arg+0x2c
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_promote_pde+0x21e
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_enter+0x352
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_radix_insert+0x43
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_pqbatch_submit_page+0x43
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`trap_pfault+0x195
>                3
>
>              kernel`vm_fault+0x1a67
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`get_pv_entry+0x168
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_radix_insert+0x49
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_radix_remove+0x39
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`pmap_enter+0x45a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`get_pv_entry+0x16a
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_fault+0x6b
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`get_pv_entry+0x16c
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`get_pv_entry+0x16c
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_radix_lookup_le+0xdd
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_domain_allocate+0x2f
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_domainset_iter_page_init+0x40
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`free_pv_entry+0xe3
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_fault+0x374
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`uma_zalloc_arg+0x47
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`pmap_enter+0x36c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_radix_insert+0x5f
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_radix_lookup_le+0xef
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_pager_get_pages+0x61
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_enter+0x971
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_enter+0x172
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_map_lookup_done+0x33
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`zone_import+0x113
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`get_pv_entry+0x83
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`uma_zfree_arg+0x43
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_map_lookup+0x45
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`uma_zalloc_arg+0x756
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`_pmap_allocpte+0x2b8
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_radix_insert+0x16a
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_map_lookup_done+0x3c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_map_lookup_done+0x3c
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`0xffffffff81066bdc
>                3
>
>              kernel`sx_try_slock_+0x4c
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`zone_import+0x123
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_enter+0x988
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`free_pv_entry+0xd
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_radix_lookup+0x13
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`pmap_enter+0x198
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`userret+0x59
>                3
>
>              kernel`pmap_copy+0x47a
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`pmap_copy+0x47d
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                3
>
>              kernel`vm_reserv_populate+0x1e
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_reserv_alloc_page+0xfe
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_page_alloc_domain_after+0x26e
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                3
>
>              kernel`vm_radix_lookup_le+0x26
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_domain_allocate+0x7c
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_try_insert_pv_entry+0xdc
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_fault+0x1bbd
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_enter+0x2af
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_page_dequeue+0xd0
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_page_alloc+0x11
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`_mtx_trylock_flags_+0x37
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_fault_trap+0x149
>                4
>
>              kernel`vm_page_alloc_domain_after+0x48a
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_enter+0xbc
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_radix_lookup_le+0x3d
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`_sx_sunlock_int+0x2d
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`__rw_try_upgrade_int+0xb0
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_copy+0x2a0
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_fault+0xd1
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_reserv_alloc_page+0x21
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`trap_pfault+0x4
>                4
>
>              kernel`vm_reserv_extend+0x107
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_radix_insert+0xbb
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_page_alloc+0x2b
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_copy+0x2ab
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`pmap_enter+0x8d0
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_pqbatch_submit_page+0x3c1
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_try_insert_pv_entry+0x1
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_radix_lookup+0x54
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_try_insert_pv_entry+0x4
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`pmap_promote_pde+0x4a6
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_enter+0x4d7
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_reserv_extend+0x18
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_promote_pde+0x4a9
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_fault+0x3ea
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_radix_lookup+0x5c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_object_set_writeable_dirty+0x2d
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_try_insert_pv_entry+0xe
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              dtrace.ko`dtrace_trap+0x1
>                4
>
>              kernel`vm_domainset_iter_page_init+0xc4
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_fault+0x11f5
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_fault+0x19f9
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_page_dequeue+0xa
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`swp_pager_meta_ctl+0x3c
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_radix_lookup_le+0x16c
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_page_dequeue+0xd
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_reserv_rename+0xfe
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_page_alloc+0x51
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_reserv_alloc_page+0x153
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`dump_add_page+0x26
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_copy+0x4d6
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`lock_delay+0x37
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_enter+0x3f9
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_pqbatch_submit_page+0x3e9
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`get_pv_entry+0x20b
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_page_alloc_domain_after+0xce
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`get_pv_entry+0xe
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`_vm_map_trylock_read+0x22
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_copy+0x4e4
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`__rw_try_upgrade_int
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`trap_check
>                4
>
>              kernel`vm_domainset_iter_page+0x52
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_radix_lookup_le+0x192
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`pmap_copy+0x4f3
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_fault+0xc26
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`get_pv_entry+0x29
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_map_lookup+0xea
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`uma_zalloc_arg
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`get_pv_entry+0x30
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_domainset_iter_page_init+0x1
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`PHYS_TO_VM_PAGE+0x1
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_page_alloc_domain_after+0x3f2
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`__rw_try_upgrade_int+0x13
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_reserv_alloc_page+0x85
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`get_pv_entry+0x36
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`PHYS_TO_VM_PAGE+0x7
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`trap_check+0x18
>                4
>
>              kernel`PHYS_TO_VM_PAGE+0xb
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_fault+0x1b3c
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`__rw_try_upgrade_int+0x1c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_copy+0x50c
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`pagezero_erms+0xf
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_map_process_deferred
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_page_alloc_domain_after+0x4
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_map_process_deferred+0x6
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_map_lookup+0x6
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_domain_allocate+0xa
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_reserv_extend+0x17e
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_page_rename+0x1ce
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`pmap_enter+0x140
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`PHYS_TO_VM_PAGE+0x21
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`trap_pfault+0x82
>                4
>
>              kernel`vm_page_alloc_domain_after+0x15
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_map_lookup+0xa16
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_fault+0x457
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`PHYS_TO_VM_PAGE+0x29
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_page_rename+0x1df
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`sx_try_slock_+0x20
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pctrie_lookup
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_page_alloc_domain_after+0x21
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_domain_allocate+0x21
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_map_lookup+0x22
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_protect+0x2f7
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_fault+0x69
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_fault+0x16b
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pctrie_lookup_le+0xb
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`uma_zalloc_arg+0x3e
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_enter+0x35f
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_fault+0x1a71
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_enter+0x164
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_pqbatch_submit_page+0x254
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_radix_insert+0x159
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_enter+0x96a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`userret+0x2b
>                4
>
>              kernel`vm_fault+0x7b
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_object_deallocate+0x53c
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_protect+0x30f
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_fault_trap+0x1
>                4
>
>              kernel`vm_fault+0x181
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`get_pv_entry+0x183
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_radix_insert+0x64
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_page_rename+0x4
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`get_pv_entry+0x188
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_radix_remove+0x5d
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_radix_insert+0x170
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_radix_insert+0x171
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_page_alloc_domain_after+0x451
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_radix_insert+0x72
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_reserv_populate+0x4
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_object_split+0x5c6
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`free_pv_entry+0x9
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_fault_trap+0x1b
>                4
>
>              kernel`pmap_enter+0x18d
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_reserv_alloc_page+0x2ee
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_phys_alloc_npages+0xa1
>              kernel`vm_page_alloc+0x74
>              kernel`_pmap_allocpte+0xa3
>              kernel`pmap_copy+0x459
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`vm_page_rename+0x21
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                4
>
>              kernel`pmap_enter+0x493
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_domain_allocate+0x65
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`uma_zalloc_arg+0x75
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`pmap_promote_pde+0x467
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_page_alloc_domain_after+0x6b
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_fault+0x19ae
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_radix_lookup_le+0x11f
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`free_pv_entry+0x1f
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                4
>
>              kernel`vm_fault+0x3b0
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_page_activate
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_phys_alloc_npages+0xb3
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_page_activate+0x4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_radix_insert+0x95
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`pmap_try_insert_pv_entry+0xd5
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`get_pv_entry+0x1b9
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`vm_page_rename+0x13c
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`vm_page_dequeue+0x1d1
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_fault+0x1c2
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_fault+0x1c7
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`__rw_try_upgrade_int+0xa9
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`trap+0x3e9
>                5
>
>              kernel`pmap_enter+0x1ba
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_radix_lookup+0x3d
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`swp_pager_meta_ctl+0xd
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`vm_fault+0x19cf
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`pmap_enter+0x4bf
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_reserv_rename+0x1d1
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`pmap_enter+0x2c1
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`userret+0x182
>                5
>
>              kernel`vm_fault_trap+0x52
>                5
>
>              kernel`vm_page_alloc+0x26
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_pqbatch_submit_page+0x2b7
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`pmap_enter+0x8c9
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`trap_pfault+0xa
>                5
>
>              kernel`vm_fault+0x19df
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_radix_insert+0xc3
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`free_pv_entry+0x54
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_radix_insert+0xc7
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_fault+0x11eb
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`uma_zfree_arg+0xab
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`pmap_try_insert_pv_entry+0xd
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`vm_object_split+0x31e
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`pmap_copy+0x4bf
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`trap+0x110
>                5
>
>              kernel`trap+0x14
>                5
>
>              kernel`pmap_enter+0xea
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`__rw_wlock_hard+0x18b
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_fault+0x19fc
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_radix_lookup_le+0x16f
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`pmap_try_insert_pv_entry+0x20
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`vm_radix_lookup_le+0x173
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_page_dequeue+0x15
>              kernel`pmap_copy+0x459
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`vm_map_lookup+0xc5
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`dump_add_page+0x26
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`rangeset_lookup+0x6
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`trap_pfault+0x37
>                5
>
>              kernel`vm_page_alloc_domain_after+0x4c8
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_reserv_populate+0x79
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`trap_pfault+0x139
>                5
>
>              kernel`get_pv_entry+0xc
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`get_pv_entry+0xd
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`get_pv_entry+0xd
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`get_pv_entry+0x20f
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`get_pv_entry+0x11
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`vm_domainset_iter_page_init+0xe3
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_page_alloc+0x66
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_domain_allocate+0xd6
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`pmap_enter+0x8
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`pmap_enter+0x40b
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`pmap_copy+0x4ec
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`unlock_and_deallocate+0x3e
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              dtrace.ko`dtrace_trap+0x32
>                5
>
>              kernel`vm_domainset_iter_first+0x4
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_reserv_extend+0x59
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`get_pv_entry+0x29
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`vm_page_alloc_domain_after+0x3eb
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`pmap_enter+0x1b
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`pmap_try_insert_pv_entry+0x4c
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`vm_reserv_extend+0x161
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_domainset_iter_page+0x63
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`swp_pager_meta_ctl+0x173
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`pagezero_erms+0x4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`pmap_enter+0x926
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_domainset_iter_page_init+0xa
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_page_alloc+0x8f
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`get_pv_entry+0x43
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_fault+0x46
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_page_alloc+0x97
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`pmap_enter+0x337
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`get_pv_entry+0x47
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_map_lookup+0xc
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_map_lookup_done
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_pqbatch_submit_page+0x30
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`PHYS_TO_VM_PAGE+0x21
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`trap+0x71
>                5
>
>              kernel`pmap_enter+0x442
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`userret+0x6
>                5
>
>              kernel`swap_pager_getpages+0x28
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`PHYS_TO_VM_PAGE+0x28
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`vm_page_alloc_domain_after+0x419
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`trap+0x79
>                5
>
>              kernel`vm_reserv_alloc_page+0xac
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`pmap_enter+0x94c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`pmap_enter+0x250
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_pqbatch_submit_page+0x247
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`get_pv_entry+0x168
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_fault+0x196a
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`free_pv_entry+0xdd
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_reserv_extend+0x9e
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`pctrie_lookup_le+0xe
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_fault+0x370
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_radix_insert+0x152
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_page_alloc_domain_after+0x232
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`pmap_enter+0x264
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_domainset_iter_first+0x56
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`0xffffffff81066bc7
>                5
>
>              kernel`vm_map_lookup+0x3a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_page_alloc_domain_after+0x23d
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_domainset_iter_first+0x60
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`get_pv_entry+0x83
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`vm_radix_insert+0x16a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`pmap_enter+0x27a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_fault+0x8f
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_fault+0x892
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_page_rename+0x14
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`vm_map_lookup+0x58
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_map_lookup+0x5c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_fault+0x19a1
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_page_rename+0x123
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`vm_reserv_extend+0xd6
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_page_rename+0x26
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`pmap_copy+0x476
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`vm_radix_lookup_le+0x17
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`pmap_try_insert_pv_entry+0xc9
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`_sx_sunlock_int+0xd
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                5
>
>              kernel`vm_object_split+0x2de
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                5
>
>              kernel`vm_page_alloc
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_radix_lookup_le+0x12a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`vm_radix_lookup_le+0x12d
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`__rw_try_upgrade_int+0x9e
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_fault_trap+0x3f
>                6
>
>              kernel`vm_radix_lookup_le+0x30
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`_sx_sunlock_int+0x20
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`pmap_try_insert_pv_entry+0xe2
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`pmap_enter+0xb4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_fault+0x3c7
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_page_alloc+0x17
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`swp_pager_meta_ctl+0xa
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`vm_page_rename+0x4b
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`pmap_enter+0x4bb
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_page_rename+0x14d
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`_sx_sunlock_int+0x31
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_fault_trap+0x55
>                6
>
>              kernel`free_pv_entry+0x47
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`userret+0x189
>                6
>
>              kernel`trap_pfault+0x20e
>                6
>
>              kernel`pmap_copy+0x4b1
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`trap_pfault+0x11
>                6
>
>              kernel`vm_radix_insert+0xc3
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_page_rename+0x63
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`vm_page_activate+0x35
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`unlock_and_deallocate+0x6
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`pmap_try_insert_pv_entry+0x6
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`vm_fault+0x2e9
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`pmap_copy+0x4b9
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`vm_fault_trap+0x6a
>                6
>
>              kernel`vm_fault+0xeb
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_reserv_alloc_page+0x3b
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`pmap_enter+0x1dc
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`pctrie_lookup_le+0x190
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_fault+0x19f2
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`pmap_promote_pde+0x4b4
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_page_dequeue+0x6
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_domain_allocate+0xb8
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_page_alloc_domain_after+0x4ba
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`pmap_copy+0x2ca
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`vm_fault
>                6
>
>              kernel`vm_object_set_writeable_dirty+0x40
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`get_pv_entry
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_page_dequeue+0x11
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`unlock_and_deallocate+0x23
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_map_lookup+0xfc5
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_fault+0x6
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_reserv_rename+0x8
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`get_pv_entry+0x8
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`trap+0x129
>                6
>
>              kernel`vm_page_activate+0x5f
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_reserv_rename+0x11
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`unlock_and_deallocate+0x132
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`unlock_and_deallocate+0x35
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_page_rename+0x198
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`pmap_enter+0x50b
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_fault+0x11e
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_object_reference_locked
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_map_lookup_entry
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_fault+0xe27
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`swap_pager_getpages
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`PHYS_TO_VM_PAGE
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`pmap_zero_page+0x4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`get_pv_entry+0x36
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_radix_insert+0x118
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_pqbatch_submit_page+0x19
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_page_dequeue+0x4b
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_page_rename+0x1c4
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`pmap_zero_page+0x15
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_map_lookup+0xa06
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`trap+0x67
>                6
>
>              kernel`__rw_rlock_int
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`pmap_copy+0x521
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`vm_object_pip_add+0x4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_object_deallocate+0x17
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_page_rename+0xda
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`__rw_try_upgrade_int+0x3a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_map_lookup+0x1b
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_pqbatch_submit_page+0x23d
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_fault+0x15f
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`swap_pager_copy+0x1d0
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`vm_domainset_iter_page_init+0x32
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`__rw_try_upgrade_int+0x43
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`pmap_promote_pde+0x123
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`pmap_enter+0x954
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_reserv_alloc_page+0x3b5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`__rw_try_upgrade_int+0x47
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_map_lookup+0x29
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`_sx_slock_int+0x3b
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_object_pip_wakeup
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`zone_import+0x202
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_pqbatch_submit_page+0x52
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`trap+0x69e
>                6
>
>              kernel`vm_fault_trap
>                6
>
>              kernel`vm_fault+0x1b80
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`get_pv_entry+0x186
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`vm_fault_trap+0x8
>                6
>
>              kernel`pmap_enter+0x97a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`pmap_try_insert_pv_entry+0xaa
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`vm_reserv_alloc_page+0xdb
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`pmap_promote_pde+0x44b
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_object_split+0x5bc
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`vm_domainset_iter_first+0x6d
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_fault_trap+0xe
>                6
>
>              kernel`vm_page_rename+0x10e
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`pmap_try_insert_pv_entry+0xb6
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`vm_object_deallocate+0x58
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`vm_map_lookup+0xb58
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              dtrace.ko`dtrace_trap+0xae
>                6
>
>              kernel`pmap_try_insert_pv_entry+0xbe
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`vm_object_split+0x5d2
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`vm_radix_insert+0x83
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                6
>
>              kernel`get_pv_entry+0x1a6
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                6
>
>              kernel`vm_radix_remove+0x83
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`vm_page_dequeue+0x1c3
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`pmap_protect+0x34a
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`vm_page_dequeue+0x1ca
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_page_activate+0xc
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_object_deallocate+0x7f
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`swp_pager_meta_ctl+0x4
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`vm_object_set_writeable_dirty+0x4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_object_split+0x5f6
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`vm_domainset_iter_page_init+0x98
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_reserv_populate+0x138
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_fault+0x1bca
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_pqbatch_submit_page+0x3ae
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_fault+0x2d3
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_fault+0x1bd3
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_radix_insert+0xb4
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`vm_object_split+0x305
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`vm_page_alloc_domain_after+0x498
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_map_lookup+0xe99
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`free_pv_entry+0x4f
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_fault+0x19e3
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`trap_pfault+0x115
>                7
>
>              kernel`_sx_sunlock_int+0x47
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_fault+0x5e8
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`pmap_enter+0x8d8
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_reserv_extend+0x119
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_fault+0x2f3
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_fault+0x3f8
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_map_lookup+0xeb8
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_reserv_extend+0x12b
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`pmap_try_insert_pv_entry+0x1b
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`trap_pfault+0x12d
>                7
>
>              kernel`vm_fault_trap+0x80
>                7
>
>              kernel`vm_page_activate+0x56
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_radix_lookup_le+0x17b
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`vm_fault+0xd
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_fault+0x1b0f
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_object_split+0x640
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`vm_object_deallocate+0x5d2
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_reserv_extend+0x145
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_object_deallocate+0x5db
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_reserv_extend+0x14d
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_radix_insert
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_map_lookup_entry+0x200
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_pqbatch_submit_page
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_radix_lookup_le+0x192
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_fault+0x1825
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`trap_check+0x5
>                7
>
>              kernel`vm_map_lookup_entry+0x6
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_pqbatch_submit_page+0x6
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_page_rename+0xaa
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`trap_pfault+0x5c
>                7
>
>              kernel`vm_fault+0x182d
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`trap_pfault+0x5d
>                7
>
>              kernel`pmap_enter+0x41f
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`pmap_enter+0x121
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_domainset_iter_page_init+0x4
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`PHYS_TO_VM_PAGE+0x4
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`vm_domainset_iter_first+0x18
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`_sx_slock_int+0x8
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_fault+0x63a
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_map_lookup+0xfb
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`unlock_and_deallocate+0x164
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_object_deallocate+0x4
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_map_lookup+0x4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_domainset_iter_page_init+0x18
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`pmap_enter+0x43a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_fault+0x44b
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_map_lookup_entry+0x30
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_page_rename+0x1da
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`__rw_rlock_int+0xd
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_fault+0x5e
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`pmap_enter+0x151
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`sx_try_slock_+0x27
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`pmap_protect+0x301
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`0xffffffff81066bc2
>                7
>
>              kernel`vm_fault+0x1d74
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_object_pip_wakeup+0x4
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`get_pv_entry+0x178
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_fault+0x580
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_page_rename
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`pmap_try_insert_pv_entry+0xa0
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`vm_fault+0x281
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`uma_zalloc_arg+0x751
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`vm_pqbatch_submit_page+0x261
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_reserv_extend+0xb5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_fault+0x1a87
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_object_deallocate+0x48
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_pqbatch_submit_page+0x172
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_object_deallocate+0x553
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_radix_lookup_le+0x4
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`vm_domainset_iter_first+0x76
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              dtrace.ko`dtrace_trap+0xa8
>                7
>
>              kernel`vm_page_alloc_domain_after+0x58
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_page_zone_import+0x159
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_page_alloc_domain_after+0x45b
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_fault+0x199d
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_object_pip_wakeup+0x31
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_phys_alloc_npages+0xa1
>              kernel`vm_page_alloc+0x74
>              kernel`get_pv_entry+0x5e
>              kernel`pmap_try_insert_pv_entry+0x20
>              kernel`pmap_copy+0x4cb
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`vm_fault+0x1a3
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`uma_zalloc_arg+0x75
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`vm_radix_lookup+0x16
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`get_pv_entry+0x1ab
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                7
>
>              kernel`vm_radix_lookup_le+0x11f
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                7
>
>              kernel`pmap_enter+0x8a0
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`pmap_try_insert_pv_entry+0xd3
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`pmap_try_insert_pv_entry+0xda
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`vm_reserv_populate+0x2e
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`swap_pager_haspage+0x6d
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_radix_lookup_le+0x4e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`unlock_and_deallocate
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_page_alloc_domain_after+0xa0
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_map_lookup+0xa0
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`trap+0x4
>                8
>
>              kernel`pmap_copy+0x2b4
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`pmap_try_insert_pv_entry+0xa
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`pmap_try_insert_pv_entry+0xc
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`vm_map_lookup+0xead
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_page_alloc+0x43
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              dtrace.ko`dtrace_trap+0x5
>                8
>
>              kernel`vm_page_alloc_domain_after+0x4c1
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_page_alloc_domain_after+0xc4
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`swp_pager_meta_ctl+0x47
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`get_pv_entry+0x207
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`get_pv_entry+0x207
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_fault+0x1a0b
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`pmap_try_insert_pv_entry+0x2c
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`rangeset_lookup+0xe
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`pmap_try_insert_pv_entry+0x36
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`vm_map_lookup+0x9d6
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`trap+0x13b
>                8
>
>              kernel`vm_page_alloc_domain_after+0x2dd
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`rangeset_lookup+0x22
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_object_deallocate+0x5e3
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_radix_insert+0x4
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`trap_pfault+0x55
>                8
>
>              kernel`pmap_enter+0x417
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`pmap_copy+0x4f7
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`vm_radix_insert+0x8
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`rangeset_lookup+0x29
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_radix_insert+0xc
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_map_lookup_entry+0xd
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_radix_insert+0x11
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`vm_page_dequeue+0x46
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`get_pv_entry+0x3a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`pagezero_erms+0xd
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`pmap_enter+0x42e
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_fault+0x440
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_fault+0x1b44
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_page_lookup+0x4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`pmap_enter+0x937
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_page_rename+0xc8
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`vm_map_lookup+0x8
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`_sx_slock_int+0x1a
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_map_lookup_done+0xb
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`0xffffffff81066bae
>                8
>
>              kernel`pmap_enter+0x455
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`_sx_slock_int+0x37
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`userret+0x19
>                8
>
>              kernel`vm_map_lookup+0x2c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_page_alloc_domain_after+0x2e
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_radix_lookup_le+0xea
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`vm_radix_lookup_le+0xef
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`trap+0x9f
>                8
>
>              kernel`swap_pager_copy+0x1f2
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`vm_radix_insert+0x64
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_domainset_iter_first+0x67
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`__rw_rlock_int+0x3b
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_page_rename+0xc
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                8
>
>              kernel`pmap_enter+0x37e
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_map_lookup+0x50
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`uma_zalloc_arg+0x64
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_fault+0x295
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_fault+0x1b9f
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`vm_object_deallocate+0x61
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`get_pv_entry+0x1a6
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                8
>
>              kernel`get_pv_entry+0x1b2
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`vm_page_rename+0x37
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`pctrie_lookup+0x59
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`swp_pager_meta_ctl
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`pmap_protect+0x351
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`_mtx_trylock_flags_+0x37
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`pmap_enter+0x8b8
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_page_activate+0x19
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`trap_pfault+0xf9
>                9
>
>              kernel`vm_map_lookup+0xe89
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`calltrap
>                9
>
>              kernel`pmap_enter+0x5c4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`pmap_protect+0x365
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`vm_fault+0x3db
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_radix_lookup_le+0x51
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`trap+0xa
>                9
>
>              kernel`trap+0x40b
>                9
>
>              kernel`vm_page_alloc_domain_after+0x2bd
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_pqbatch_submit_page+0x3e2
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_fault+0x605
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_page_rename+0x186
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`get_pv_entry+0x6
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`get_pv_entry+0x6
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_radix_lookup_le+0x178
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_fault+0x1a0e
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_fault+0x181a
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_map_lookup+0xdc
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_fault+0x1b20
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_radix_insert+0x1
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`pmap_copy+0x4fc
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`vm_fault+0x1b30
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`_sx_slock_int
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_radix_remove+0x1
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`vm_page_alloc_domain_after+0x2f2
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_radix_insert+0x14
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`PHYS_TO_VM_PAGE+0x4
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_page_rename+0xb9
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`vm_page_alloc_domain_after+0x3fb
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_reserv_extend+0x74
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`get_pv_entry+0x47
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`vm_page_lookup+0x9
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_radix_insert+0x30
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`trap_check+0x30
>                9
>
>              kernel`pmap_enter+0x34a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`pmap_enter+0xa4b
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`pmap_enter+0x44d
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_fault+0x1a60
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`swap_pager_copy+0x1d4
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`__rw_rlock_int+0x1a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_map_process_deferred+0x2b
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`swap_pager_copy+0x2e4
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`vm_fault+0x1a75
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_object_pip_wakeup+0x14
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`uma_zalloc_arg+0x756
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`get_pv_entry+0x188
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`vm_radix_lookup_le+0x4
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_domain_allocate+0x59
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`_sx_sunlock_int
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_radix_lookup_le+0x17
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>                9
>
>              kernel`vm_object_deallocate+0x69
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`pmap_enter+0x999
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`vm_pqbatch_submit_page+0x18d
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>                9
>
>              kernel`pmap_enter+0x1a9
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`trap+0xf6
>               10
>
>              kernel`vm_page_rename+0x15c
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               10
>
>              kernel`vm_page_alloc_domain_after+0x29c
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`vm_fault+0x1ae8
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`_vm_map_trylock_read+0x1
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`vm_page_activate+0x44
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`trap_pfault+0x226
>               10
>
>              kernel`vm_map_lookup+0xfbe
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`get_pv_entry+0x1ff
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               10
>
>              kernel`lock_delay+0x32
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               10
>
>              kernel`trap+0x2e
>               10
>
>              kernel`_vm_map_trylock_read+0x26
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`vm_fault+0x1a17
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`get_pv_entry+0x24
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               10
>
>              kernel`pmap_enter+0x215
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`vm_map_lookup+0x9e5
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`trap_check+0x6
>               10
>
>              kernel`vm_map_lookup_entry+0x209
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`vm_fault+0xc2c
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`pmap_copy+0x4ff
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               10
>
>              kernel`vm_radix_remove+0x6
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               10
>
>              kernel`vm_radix_insert+0x1a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               10
>
>              kernel`trap+0x78
>               10
>
>              kernel`_sx_slock_int+0x2a
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`vm_map_process_deferred+0x22
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`vm_fault+0x1b6f
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`_sx_slock_int+0x46
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`get_pv_entry+0x17c
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`vm_page_rename+0xfd
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               10
>
>              kernel`vm_radix_remove+0x52
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               10
>
>              kernel`vm_page_alloc_domain_after+0x43
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`__rw_rlock_int+0x37
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`vm_pqbatch_submit_page+0x268
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`vm_radix_insert+0x6a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               10
>
>              kernel`vm_pqbatch_submit_page+0x6a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`pmap_enter+0x289
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`__rw_rlock_hard+0xfc
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`vm_pqbatch_submit_page+0x7f
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`vm_fault+0x1ba7
>              kernel`0xffffffff81066c28
>               10
>
>              kernel`trap+0x3da
>               11
>
>              kernel`vm_page_dequeue+0x1d1
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`swp_pager_meta_ctl+0x6
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               11
>
>              kernel`vm_radix_lookup_le+0x140
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`vm_domainset_iter_page_init+0xa8
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`trap+0x410
>               11
>
>              kernel`vm_fault+0x19fe
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`doreti
>               11
>
>              kernel`get_pv_entry
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               11
>
>              kernel`pmap_copy+0x2d0
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               11
>
>              kernel`get_pv_entry+0x4
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               11
>
>              kernel`vm_page_dequeue+0x15
>              kernel`pmap_enter+0x8c3
>              kernel`vm_fault+0x1aa5
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`vm_page_dequeue+0x15
>              kernel`pmap_try_insert_pv_entry+0x20
>              kernel`pmap_copy+0x4cb
>              kernel`vmspace_fork+0x38e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               11
>
>              kernel`vm_page_rename+0x8e
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               11
>
>              kernel`pmap_try_insert_pv_entry+0x2f
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               11
>
>              kernel`pmap_try_insert_pv_entry+0x3d
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               11
>
>              kernel`pmap_try_insert_pv_entry+0x44
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               11
>
>              kernel`vm_reserv_extend+0x155
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`swp_pager_meta_ctl+0x16b
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               11
>
>              kernel`vm_fault+0x2d
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`vm_pqbatch_submit_page+0xd
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`vm_domainset_iter_page_init
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`swp_pager_meta_ctl+0x17b
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               11
>
>              kernel`vm_fault+0x1a3c
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`sx_try_slock_
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`vm_domain_allocate
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`pmap_enter+0x131
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`PHYS_TO_VM_PAGE+0x12
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`sx_try_slock_+0x7
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`trap_check+0x28
>               11
>
>              kernel`vm_map_lookup+0xa
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`vm_object_pip_add
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`userret+0xf
>               11
>
>              kernel`pmap_protect+0x2f3
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               11
>
>              kernel`vm_radix_remove+0x35
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               11
>
>              kernel`get_pv_entry+0x17c
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               11
>
>              kernel`vm_radix_insert+0x5f
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`vm_radix_insert+0x62
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`vm_radix_insert+0x6a
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`pmap_enter+0x47f
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`vm_radix_lookup+0x4
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`uma_zalloc_arg+0x64
>              kernel`vmspace_fork+0x97a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               11
>
>              kernel`vm_page_alloc_domain_after+0x260
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`uma_zalloc_arg+0x777
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               11
>
>              kernel`vm_fault_trap+0x150
>               12
>
>              kernel`zone_fetch_slab+0x47
>              kernel`vm_page_alloc_domain_after+0x301
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               12
>
>              kernel`zone_import+0x78
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               12
>
>              kernel`vm_radix_lookup+0x5d
>              kernel`0xffffffff81066c28
>               12
>
>              kernel`get_pv_entry+0x20f
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               12
>
>              kernel`pmap_enter+0x6
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               12
>
>              kernel`vm_fault+0x61b
>              kernel`0xffffffff81066c28
>               12
>
>              kernel`trap_check+0x1
>               12
>
>              kernel`vm_domainset_iter_page+0x5f
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               12
>
>              kernel`pmap_zero_page+0x12
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               12
>
>              kernel`vm_page_alloc+0x9f
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               12
>
>              kernel`vm_radix_lookup_le+0xd0
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               12
>
>              kernel`pmap_protect+0x5f9
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               12
>
>              kernel`vm_fault+0x277
>              kernel`0xffffffff81066c28
>               12
>
>              kernel`vm_radix_insert+0x5c
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               12
>
>              kernel`vm_radix_insert+0x161
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               12
>
>              kernel`pmap_enter+0x177
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               12
>
>              kernel`pmap_try_insert_pv_entry+0xa7
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               12
>
>              kernel`vm_fault+0x1b90
>              kernel`0xffffffff81066c28
>               12
>
>              kernel`vm_domain_allocate+0x50
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               12
>
>              kernel`get_pv_entry+0x192
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               12
>
>              kernel`get_pv_entry+0x19a
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               12
>
>              kernel`vm_radix_insert+0x83
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               12
>
>              kernel`uma_zalloc_arg+0x75
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               12
>
>              kernel`vm_page_dequeue+0x1ca
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               13
>
>              kernel`vm_radix_lookup_le+0x140
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               13
>
>              kernel`vm_radix_lookup+0x43
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               13
>
>              kernel`vm_object_split+0x309
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               13
>
>              kernel`vm_radix_lookup_le+0x17b
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               13
>
>              kernel`__rw_try_upgrade_int+0x6
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               13
>
>              kernel`pmap_enter+0x219
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               13
>
>              kernel`swp_pager_meta_ctl+0x6e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               13
>
>              kernel`get_pv_entry+0x3a
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               13
>
>              kernel`vm_radix_insert+0x27
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               13
>
>              kernel`userret
>               13
>
>              kernel`get_pv_entry+0x178
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               13
>
>              kernel`vm_fault+0x1a7c
>              kernel`0xffffffff81066c28
>               13
>
>              kernel`pmap_protect+0x319
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               13
>
>              kernel`pmap_try_insert_pv_entry+0xae
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               13
>
>              kernel`vm_fault+0x8a3
>              kernel`0xffffffff81066c28
>               13
>
>              kernel`pmap_enter+0x29c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               13
>
>              kernel`vm_radix_lookup_le+0x26
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               14
>
>              kernel`vm_object_split+0x2f4
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               14
>
>              kernel`pmap_enter+0xc6
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               14
>
>              kernel`get_pv_entry+0xdc
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               14
>
>              kernel`pmap_enter+0xfa
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               14
>
>              kernel`vm_fault+0x1a15
>              kernel`0xffffffff81066c28
>               14
>
>              kernel`vm_fault+0xe50
>              kernel`0xffffffff81066c28
>               14
>
>              kernel`vm_radix_lookup_le+0xcd
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               14
>
>              kernel`vm_radix_insert+0x53
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               14
>
>              kernel`vm_radix_insert+0x80
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               14
>
>              kernel`pmap_enter+0x4b0
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               15
>
>              kernel`trap+0x3e2
>               15
>
>              kernel`vm_fault+0x2cc
>              kernel`0xffffffff81066c28
>               15
>
>              kernel`vm_page_alloc_domain_after+0x290
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               15
>
>              kernel`pmap_protect+0x5b8
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               15
>
>              kernel`vm_radix_insert+0x6e
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               15
>
>              kernel`pmap_enter+0x317
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               16
>
>              kernel`vm_radix_lookup_le+0xe0
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               16
>
>              kernel`vm_radix_insert+0x62
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               16
>
>              kernel`uma_zalloc_arg+0x75b
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               16
>
>              kernel`pmap_protect+0x328
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               16
>
>              kernel`pmap_enter+0x991
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               16
>
>              kernel`pmap_promote_pde+0x462
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               16
>
>              kernel`vm_map_lookup+0x64
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               16
>
>              kernel`vm_page_dequeue+0x1c3
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               17
>
>              kernel`vm_fault+0x1a1b
>              kernel`0xffffffff81066c28
>               17
>
>              kernel`vm_radix_lookup_le+0x19b
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               17
>
>              kernel`sx_try_slock_+0x1
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               17
>
>              kernel`pmap_protect+0x314
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               17
>
>              kernel`get_pv_entry+0x19a
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               17
>
>              kernel`get_pv_entry+0x1ab
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               17
>
>              kernel`vm_fault+0xbc
>              kernel`0xffffffff81066c28
>               18
>
>              kernel`vm_fault+0x19bf
>              kernel`0xffffffff81066c28
>               18
>
>              kernel`vm_radix_lookup_le+0x36
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               18
>
>              kernel`vm_radix_lookup_le+0x16f
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               18
>
>              kernel`vm_fault+0x1a26
>              kernel`0xffffffff81066c28
>               18
>
>              kernel`sx_try_slock_+0x1e
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               18
>
>              kernel`vm_radix_insert+0x6e
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               18
>
>              kernel`get_pv_entry+0xa
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               19
>
>              kernel`vm_radix_insert+0x1a
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               19
>
>              kernel`vm_radix_insert+0x72
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               19
>
>              kernel`get_pv_entry+0x192
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               19
>
>              kernel`vm_fault+0x19e9
>              kernel`0xffffffff81066c28
>               20
>
>              kernel`pmap_protect+0x5b0
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               20
>
>              kernel`vm_radix_insert+0x5c
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               20
>
>              kernel`pmap_copy+0x2b7
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               21
>
>              kernel`_vm_map_trylock_read
>              kernel`0xffffffff81066c28
>               21
>
>              kernel`vm_radix_lookup_le+0xea
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               21
>
>              kernel`vm_object_set_writeable_dirty+0x1
>              kernel`0xffffffff81066c28
>               22
>
>              kernel`vm_radix_lookup_le+0x4b
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               22
>
>              kernel`vm_radix_lookup_le+0x51
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               22
>
>              kernel`vm_radix_lookup_le+0x16c
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               22
>
>              kernel`vm_radix_lookup_le+0x173
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               22
>
>              kernel`get_pv_entry+0x2d
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               22
>
>              kernel`pmap_try_insert_pv_entry+0x72
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               22
>
>              kernel`vm_radix_lookup+0x1e
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               22
>
>              kernel`vm_fault+0x19f7
>              kernel`0xffffffff81066c28
>               23
>
>              kernel`vm_fault+0x1a1f
>              kernel`0xffffffff81066c28
>               23
>
>              kernel`vm_fault+0xe2e
>              kernel`0xffffffff81066c28
>               23
>
>              kernel`pmap_copy+0x509
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               23
>
>              kernel`sx_try_slock_+0x10
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               23
>
>              kernel`vm_radix_lookup_le+0xd0
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               23
>
>              kernel`uma_zalloc_arg+0x64
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               23
>
>              kernel`vm_radix_lookup_le+0x49
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               24
>
>              kernel`pmap_enter+0x34d
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               24
>
>              kernel`0xffffffff81066be5
>               24
>
>              kernel`vm_object_set_writeable_dirty+0x26
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               25
>
>              kernel`vm_fault+0x11f9
>              kernel`0xffffffff81066c28
>               25
>
>              kernel`get_pv_entry+0x181
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               25
>
>              kernel`vm_radix_insert+0x80
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               25
>
>              kernel`vm_radix_lookup+0x18
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               25
>
>              kernel`pmap_try_insert_pv_entry+0xce
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               25
>
>              kernel`vm_object_set_writeable_dirty
>              kernel`0xffffffff81066c28
>               26
>
>              kernel`get_pv_entry+0x2d
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               26
>
>              kernel`vm_page_alloc_domain_after+0x420
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               26
>
>              kernel`vm_radix_insert+0x67
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               26
>
>              kernel`pmap_copy+0x490
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               27
>
>              kernel`vm_reserv_extend+0x38
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               27
>
>              kernel`pagezero_erms+0xd
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               27
>
>              kernel`vm_reserv_extend+0x6c
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               28
>
>              kernel`get_pv_entry+0xdc
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               29
>
>              kernel`pmap_enter+0x5d9
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               29
>
>              kernel`vm_fault+0xe35
>              kernel`0xffffffff81066c28
>               29
>
>              kernel`vm_radix_lookup_le+0x4e
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               30
>
>              kernel`pmap_enter+0x4ce
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               30
>
>              kernel`get_pv_entry+0x181
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               30
>
>              kernel`vm_fault+0x19bd
>              kernel`0xffffffff81066c28
>               31
>
>              kernel`vm_radix_insert+0x46
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               32
>
>              kernel`vm_radix_lookup_le+0xe0
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               32
>
>              kernel`vm_fault+0x19ed
>              kernel`0xffffffff81066c28
>               33
>
>              kernel`vm_phys_alloc_npages+0xa1
>              kernel`vm_page_alloc+0x74
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               33
>
>              kernel`vm_object_set_writeable_dirty+0xb
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               34
>
>              kernel`vm_radix_insert+0x30
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               34
>
>              dtrace.ko`dtrace_trap+0x16
>               35
>
>              kernel`_vm_map_trylock_read+0x2b
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               35
>
>              kernel`sx_try_slock_+0x6
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               35
>
>              kernel`vm_domainset_iter_page+0x2d
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               36
>
>              kernel`vm_radix_insert+0x67
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               36
>
>              kernel`vm_radix_lookup+0x5a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               37
>
>              kernel`vm_radix_remove+0x10
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               37
>
>              kernel`vm_radix_remove+0x15
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               37
>
>              kernel`vm_radix_remove+0x22
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               37
>
>              kernel`vm_radix_insert+0x3c
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               37
>
>              kernel`vm_radix_lookup_le+0xcd
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               37
>
>              kernel`vm_radix_insert+0x53
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               37
>
>              kernel`pmap_protect+0x305
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               37
>
>              kernel`vm_object_reference_locked+0x8
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               38
>
>              kernel`vm_fault+0x1a2e
>              kernel`0xffffffff81066c28
>               38
>
>              kernel`vm_fault+0x1a32
>              kernel`0xffffffff81066c28
>               38
>
>              kernel`vm_radix_insert+0x77
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               38
>
>              kernel`vm_radix_lookup_le+0x36
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               39
>
>              kernel`vm_radix_lookup_le+0x40
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               39
>
>              kernel`vm_radix_lookup_le+0x4b
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               39
>
>              kernel`__rw_try_upgrade_int+0x29
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               39
>
>              kernel`_vm_map_trylock_read+0x10
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               40
>
>              kernel`pagezero_erms+0x10
>              kernel`0xffffffff81066c28
>               40
>
>              kernel`lock_delay+0x32
>              kernel`vm_fault+0x1bd3
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               41
>
>              kernel`vm_radix_lookup+0x28
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               42
>
>              kernel`pmap_enter+0x4b7
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               42
>
>              kernel`vm_reserv_alloc_page+0xf3
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               44
>
>              kernel`vm_reserv_extend+0x7d
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               45
>
>              kernel`vm_radix_insert+0x77
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               45
>
>              kernel`vm_radix_lookup+0x2c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               46
>
>              kernel`vm_reserv_rename+0x1ca
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               46
>
>              kernel`vm_radix_lookup_le+0x40
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               46
>
>              kernel`vm_reserv_alloc_page+0x16d
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               46
>
>              kernel`vm_radix_insert+0x3c
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               47
>
>              kernel`vm_radix_lookup_le+0xe5
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               48
>
>              dtrace.ko`dtrace_trap
>               49
>
>              kernel`vm_radix_lookup_le+0xe5
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               49
>
>              kernel`pmap_protect+0x5b4
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               51
>
>              kernel`vm_radix_insert+0x46
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               53
>
>              kernel`vm_radix_lookup_le+0xda
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               54
>
>              kernel`pmap_enter+0x378
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               54
>
>              kernel`vm_radix_insert+0x4f
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               55
>
>              kernel`pmap_enter+0x2d3
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               57
>
>              kernel`sx_try_slock_+0x4
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               57
>
>              kernel`pmap_try_insert_pv_entry+0xc5
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               57
>
>              kernel`_sx_sunlock_int+0x2a
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               58
>
>              kernel`pmap_try_insert_pv_entry+0xba
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               58
>
>              kernel`0xffffffff81066bee
>               58
>
>              dtrace.ko`dtrace_trap+0x2b
>               59
>
>              kernel`vm_radix_lookup_le+0xda
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               61
>
>              kernel`vm_radix_remove+0x3f
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               61
>
>              kernel`sx_try_slock_+0x41
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               63
>
>              kernel`0xffffffff81066bdd
>               67
>
>              kernel`vm_reserv_extend+0x136
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               68
>
>              kernel`__mtx_lock_sleep+0xbc
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               69
>
>              kernel`vm_radix_lookup_le+0x19b
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               72
>
>              kernel`vm_object_split+0x645
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               76
>
>              kernel`vm_radix_lookup_le+0x49
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               81
>
>              kernel`vm_radix_lookup+0x36
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               85
>
>              kernel`vm_radix_insert+0x4c
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               87
>
>              kernel`vm_radix_insert+0x4f
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               88
>
>              kernel`vm_radix_lookup_le+0x46
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>               89
>
>              kernel`vm_reserv_extend+0xfc
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               94
>
>              kernel`vm_radix_lookup+0x40
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               96
>
>              kernel`vm_radix_lookup+0x1b
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               96
>
>              kernel`vm_domain_allocate+0x76
>              kernel`vm_fault+0x5f8
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>               97
>
>              kernel`vm_fault+0x1bba
>              kernel`0xffffffff81066c28
>              107
>
>              kernel`vm_fault+0xe4c
>              kernel`0xffffffff81066c28
>              107
>
>              kernel`trap+0x37
>              109
>
>              kernel`vm_radix_lookup_le+0x46
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              112
>
>              kernel`vm_radix_remove+0x28
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>              112
>
>              kernel`vm_object_deallocate+0x7c
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              115
>
>              kernel`pmap_protect+0x373
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>              117
>
>              kernel`vm_pqbatch_submit_page+0x196
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              118
>
>              kernel`pmap_enter+0x313
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              121
>
>              kernel`vm_page_rename+0x83
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>              125
>
>              kernel`vm_radix_insert+0x4c
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>              126
>
>              kernel`unlock_and_deallocate+0x3b
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              127
>
>              kernel`vm_radix_lookup+0x10
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              131
>
>              kernel`vm_object_split+0x5eb
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>              133
>
>              kernel`vm_fault+0x1b04
>              kernel`0xffffffff81066c28
>              134
>
>              kernel`vm_radix_lookup+0x49
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              141
>
>              kernel`0xffffffff81066be6
>              145
>
>              kernel`vm_page_dequeue+0x15
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              146
>
>              kernel`vm_fault+0x1b39
>              kernel`0xffffffff81066c28
>              146
>
>              kernel`vm_pqbatch_submit_page+0x25a
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              148
>
>              kernel`vm_domainset_iter_page_init+0x1d
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              153
>
>              kernel`__rw_rlock_int+0x11
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              154
>
>              kernel`_sx_sunlock_int+0x2a
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              155
>
>              kernel`vm_radix_lookup_le+0x2b
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>              158
>
>              kernel`vm_page_activate+0x53
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              158
>
>              kernel`vm_object_deallocate+0x5e
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              163
>
>              kernel`vm_fault+0x1b9c
>              kernel`0xffffffff81066c28
>              164
>
>              kernel`pmap_enter+0x414
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              167
>
>              kernel`vm_radix_lookup+0x46
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              195
>
>              kernel`pmap_enter+0x27
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              198
>
>              kernel`vm_radix_insert+0x36
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              203
>
>              kernel`__rw_try_upgrade_int+0x40
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              227
>
>              kernel`get_pv_entry+0x24
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              228
>
>              kernel`vm_radix_insert+0x36
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>              230
>
>              kernel`vm_radix_remove+0x30
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>              239
>
>              kernel`__mtx_lock_sleep+0xfc
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              243
>
>              kernel`vm_page_rename+0x131
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>              249
>
>              kernel`vm_radix_lookup_le+0x2b
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              251
>
>              kernel`_sx_slock_int+0x34
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              251
>
>              kernel`vm_radix_lookup+0x7
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              306
>
>              kernel`vm_fault+0x484
>              kernel`0xffffffff81066c28
>              309
>
>              kernel`pmap_enter+0x98d
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              310
>
>              kernel`vm_object_split+0x656
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>              345
>
>              kernel`vm_fault+0x1a5e
>              kernel`0xffffffff81066c28
>              357
>
>              kernel`pmap_enter+0x949
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              365
>
>              kernel`pmap_enter+0x437
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              377
>
>              kernel`vm_radix_lookup+0x23
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              387
>
>              kernel`__rw_rlock_int+0x34
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              455
>
>              kernel`vm_radix_remove+0x1f
>              kernel`fork1+0x356
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>              474
>
>              kernel`vm_object_deallocate+0x550
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              534
>
>              kernel`vm_fault+0xe42
>              kernel`0xffffffff81066c28
>              536
>
>              kernel`pmap_enter+0x212
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              612
>
>              kernel`trap_pfault+0x123
>              638
>
>              kernel`pagezero_erms+0xf
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              639
>
>              kernel`vm_radix_lookup+0x30
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>              646
>
>              kernel`vm_fault+0xe3a
>              kernel`0xffffffff81066c28
>              723
>
>              kernel`vm_fault+0xe3e
>              kernel`0xffffffff81066c28
>              946
>
>              kernel`pmap_try_insert_pv_entry+0x33
>              kernel`sys_fork+0x54
>              kernel`amd64_syscall+0x387
>              kernel`0xffffffff8106754e
>              950
>
>              kernel`lock_delay+0x30
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>             1201
>
>              kernel`lock_delay+0x30
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>             1489
>
>              kernel`sx_try_slock_+0x3e
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>             2689
>
>              kernel`pagezero_erms+0xd
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>             6532
>
>              kernel`0xffffffff81066b9a
>             8156
>
>             9013
>
>              kernel`vm_fault+0x1a5b
>              kernel`0xffffffff81066c28
>            10535
>
>              kernel`lock_delay+0x32
>              kernel`vm_fault_trap+0x60
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>            16677
>
>              kernel`lock_delay+0x32
>              kernel`trap_pfault+0x19c
>              kernel`trap+0x410
>              kernel`0xffffffff81066c28
>            33785

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Attachments on bug 254639: 223724