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Lines 73-78
SYSCTL_NODE(_vfs, OID_AUTO, tmpfs, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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| 73 |
"tmpfs file system"); |
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"tmpfs file system"); |
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static long tmpfs_pages_reserved = TMPFS_PAGES_MINRESERVED; |
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static long tmpfs_pages_reserved = TMPFS_PAGES_MINRESERVED; |
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static long tmpfs_pages_avail_init; |
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static int tmpfs_mem_percent = TMPFS_MEM_PERCENT; |
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static void tmpfs_set_reserve_from_percent(void); |
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MALLOC_DEFINE(M_TMPFSDIR, "tmpfs dir", "tmpfs dirent structure"); |
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MALLOC_DEFINE(M_TMPFSDIR, "tmpfs dir", "tmpfs dirent structure"); |
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static uma_zone_t tmpfs_node_pool; |
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static uma_zone_t tmpfs_node_pool; |
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Lines 290-295
tmpfs_can_alloc_page(vm_object_t obj, vm_pindex_t pindex)
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if (tm == NULL || vm_pager_has_page(obj, pindex, NULL, NULL) || |
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if (tm == NULL || vm_pager_has_page(obj, pindex, NULL, NULL) || |
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tm->tm_pages_max == 0) |
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tm->tm_pages_max == 0) |
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return (true); |
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return (true); |
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if (tm->tm_pages_max == ULONG_MAX) |
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return (tmpfs_mem_avail() >= 1); |
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return (tm->tm_pages_max > atomic_load_long(&tm->tm_pages_used)); |
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return (tm->tm_pages_max > atomic_load_long(&tm->tm_pages_used)); |
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} |
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} |
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Lines 365-370
tmpfs_subr_init(void)
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sizeof(struct tmpfs_node), tmpfs_node_ctor, tmpfs_node_dtor, |
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sizeof(struct tmpfs_node), tmpfs_node_ctor, tmpfs_node_dtor, |
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tmpfs_node_init, tmpfs_node_fini, UMA_ALIGN_PTR, 0); |
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tmpfs_node_init, tmpfs_node_fini, UMA_ALIGN_PTR, 0); |
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VFS_SMR_ZONE_SET(tmpfs_node_pool); |
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VFS_SMR_ZONE_SET(tmpfs_node_pool); |
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tmpfs_pages_avail_init = tmpfs_mem_avail(); |
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tmpfs_set_reserve_from_percent(); |
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return (0); |
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return (0); |
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} |
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} |
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Lines 403-408
SYSCTL_PROC(_vfs_tmpfs, OID_AUTO, memory_reserved,
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sysctl_mem_reserved, "L", |
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sysctl_mem_reserved, "L", |
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"Amount of available memory and swap below which tmpfs growth stops"); |
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"Amount of available memory and swap below which tmpfs growth stops"); |
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static int |
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sysctl_mem_percent(SYSCTL_HANDLER_ARGS) |
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{ |
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int error, percent; |
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percent = *(int *)arg1; |
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error = sysctl_handle_int(oidp, &percent, 0, req); |
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if (error || !req->newptr) |
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return (error); |
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if ((unsigned) percent > 100) |
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return (EINVAL); |
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*(long *)arg1 = percent; |
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tmpfs_set_reserve_from_percent(); |
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return (0); |
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} |
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static void |
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tmpfs_set_reserve_from_percent(void) |
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{ |
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size_t reserved; |
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reserved = tmpfs_pages_avail_init * (100 - tmpfs_mem_percent) / 100; |
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if (reserved < TMPFS_PAGES_MINRESERVED) |
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tmpfs_pages_reserved = TMPFS_PAGES_MINRESERVED; |
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else |
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tmpfs_pages_reserved = reserved; |
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} |
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SYSCTL_PROC(_vfs_tmpfs, OID_AUTO, mem_percent, |
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CTLTYPE_INT|CTLFLAG_MPSAFE|CTLFLAG_RW, &tmpfs_mem_percent, 0, |
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sysctl_mem_percent, "I", |
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"Percent of available memory that can be used if no size limit"); |
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static __inline int tmpfs_dirtree_cmp(struct tmpfs_dirent *a, |
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static __inline int tmpfs_dirtree_cmp(struct tmpfs_dirent *a, |
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struct tmpfs_dirent *b); |
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struct tmpfs_dirent *b); |
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RB_PROTOTYPE_STATIC(tmpfs_dir, tmpfs_dirent, uh.td_entries, tmpfs_dirtree_cmp); |
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RB_PROTOTYPE_STATIC(tmpfs_dir, tmpfs_dirent, uh.td_entries, tmpfs_dirtree_cmp); |