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Old 30th July 2008
mc_i2020 mc_i2020 is offline
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Join Date: Jul 2008
Posts: 22
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Hi,
My computer crashed again today, but instead of forcing it to shutdown, I just waited and it did reboot and I got a kernel dump with a Fatal trap 12: Page fault.
The backtrace is given below:-



Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address = 0x8021
fault code = supervisor read, page not present
instruction pointer = 0x20:0xc071c2c7
stack pointer = 0x28:0xe7386920
frame pointer = 0x28:0xe7386958
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 25119 (make)
trap number = 12
panic: page fault
cpuid = 1
Uptime: 21m41s
Physical memory: 3573 MB
Dumping 219 MB: 204 188 172 156 140 124 108 92 76 60 44 28 12

#0 doadump () at pcpu.h:195
195 pcpu.h: No such file or directory.
in pcpu.h
(kgdb) bt
#0 doadump () at pcpu.h:195
#1 0xc0579cf1 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:409
#2 0xc0579fc4 in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:563
#3 0xc078b144 in trap_fatal (frame=0xe73868e0, eva=32801) at /usr/src/sys/i386/i386/trap.c:899
#4 0xc078b394 in trap_pfault (frame=0xe73868e0, usermode=0, eva=32801) at /usr/src/sys/i386/i386/trap.c:812
#5 0xc078bcfa in trap (frame=0xe73868e0) at /usr/src/sys/i386/i386/trap.c:490
#6 0xc07736ab in calltrap () at /usr/src/sys/i386/i386/exception.s:139
#7 0xc071c2c7 in allocdirect_merge (adphead=0x1, newadp=0xc8cd4480, oldadp=0x8001) at /usr/src/sys/ufs/ffs/ffs_softdep.c:1744
#8 0xe7386974 in ?? ()
#9 0xc6c9f440 in ?? ()
#10 0x00080120 in ?? ()
#11 0x00000000 in ?? ()
#12 0x00004000 in ?? ()
#13 0xc6c45a70 in ?? ()
#14 0xc865cd00 in ?? ()
#15 0x00000000 in ?? ()
#16 0xcb6e6e70 in ?? ()
#17 0xc6c21800 in ?? ()
#18 0xe73869e4 in ?? ()
#19 0xc070f6a1 in ffs_update (vp=0x926ce860, waitfor=1166802943) at /usr/src/sys/ufs/ffs/ffs_inode.c:110
Previous frame inner to this frame (corrupt stack?)
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