Bug 24831

Using ipfw features such as divert, natd, and fwd with squid.  Applied fix from bug
23187, which took care of that problem.  However, these panics remain.
Two are given below.  netstat -m seems to always show about 25% use
peak/max.  Hardware problems are virtually 100% ruled out, as I have
changed every component of this machine except drive cables, power supply
and drives.

IdlePTD 4308992
initial pcb at 343b20
panicstr: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0xdbc0e60c
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc0187a98
stack pointer           = 0x10:0xcbe72e00
frame pointer           = 0x10:0xcbe72e14
code segment            = base rx0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 291 (squid)
interrupt mask          = 
trap number             = 12
panic: page fault

syncing disks... 104 1 
done
Uptime: 12h35m16s

dumping to dev #ad/0x30002, offset 153250
dump ata0: resetting devices .. done
191 190 189 188 187 186 185 184 183 182 181 180 179 178 177 176 175 174 173 172 171 170 169 168 167 166 165 164 163 162 161 160 159 158 157 156 155 154 153 152 151 150 149 148 147 146 145 144 143 142 141 140 139 138 137 136 135 134 133 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 
---
#0  0xc0168732 in dumpsys ()
#1  0xc0168553 in boot ()
#2  0xc01688d0 in poweroff_wait ()
#3  0xc029a261 in trap_fatal ()
#4  0xc0299f39 in trap_pfault ()
#5  0xc0299b1f in trap ()
#6  0xc0187a98 in sbdrop ()
#7  0xc0187920 in sbflush ()
#8  0xc01873e9 in sbrelease ()
#9  0xc018494f in sofree ()
#10 0xc0184a86 in soclose ()
#11 0xc0179af6 in soo_close ()
#12 0xc015e961 in fdrop ()
#13 0xc015e8a7 in closef ()
#14 0xc015de59 in close ()
#15 0xc029a50d in syscall2 ()
#16 0xc028cc75 in Xint0x80_syscall ()
#17 0x8060790 in ?? ()
#18 0x8064fbb in ?? ()
#19 0x808742e in ?? ()
#20 0x804a325 in ?? ()
========
IdlePTD 4308992
initial pcb at 343b20
panicstr: page fault
panic messages:
---
Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0xe0c05f00
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc0182cb4
stack pointer           = 0x10:0xcbe72ccc
frame pointer           = 0x10:0xcbe72cd8
code segment            = base rx0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 301 (squid)
interrupt mask          = net tty 
trap number             = 12
panic: page fault

syncing disks... 

Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0xe0c05f00
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xc02de91d
stack pointer           = 0x10:0xcbe7288c
frame pointer           = 0x10:0xcbe728c4
code segment            = base rx0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 301 (squid)
interrupt mask          = net tty 
trap number             = 12
panic: page fault
Uptime: 10h14m11s

dumping to dev #ad/0x30002, offset 153250
dump ata0: resetting devices .. done
191 190 189 188 187 186 185 184 183 182 181 180 179 178 177 176 175 174 173 172 171 170 169 168 167 166 165 164 163 162 161 160 159 158 157 156 155 154 153 152 151 150 149 148 147 146 145 144 143 142 141 140 139 138 137 136 135 134 133 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 108 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 
---
#0  0xc0168732 in dumpsys ()
#1  0xc0168553 in boot ()
#2  0xc01688d0 in poweroff_wait ()
#3  0xc029a261 in trap_fatal ()
#4  0xc0299f39 in trap_pfault ()
#5  0xc0299b1f in trap ()
#6  0xc02de91d in load_mbuf ()
#7  0xc02b79f1 in l2_rxDSCC ()
#8  0xc02b198c in lb_receive ()
#9  0xc02b7cc8 in dscc_rxint ()
#10 0xc02b7e4c in l2_sccint ()
#11 0xc02b8109 in l2_dsccint ()
#12 0xc02b5980 in l2_int ()
#13 0xc02d00e4 in ethintr_pci ()
#14 0xc028e162 in vec5 ()
#15 0xc02454c1 in drain_output ()
#16 0xc02442e2 in softdep_fsync_mountdev ()
#17 0xc02482da in ffs_fsync ()
#18 0xc0246fe2 in ffs_sync ()
#19 0xc01960a3 in sync ()
#20 0xc0168326 in boot ()
#21 0xc01688d0 in poweroff_wait ()
#22 0xc029a261 in trap_fatal ()
#23 0xc0299f39 in trap_pfault ()
#24 0xc0299b1f in trap ()
#25 0xc0182cb4 in m_prepend ()
#26 0xc02dfeb4 in fr_bsdoutput ()
#27 0xc02e362e in etp_subifoutput ()
#28 0xc01bf2c7 in ip_output ()
#29 0xc01be824 in ip_forward ()
#30 0xc01bd8be in ip_input ()
#31 0xc01bdc2b in ipintr ()
#32 0xc028e0d5 in swi_net_next ()
#33 0x809a729 in ?? ()
#34 0x80779dd in ?? ()
#35 0x807824c in ?? ()
#36 0x8078866 in ?? ()
#37 0x8064fbb in ?? ()
#38 0x808742e in ?? ()
#39 0x804a325 in ?? ()

How-To-Repeat: unknown.  simply happens.