Date: Mon, 1 Dec 2008 12:34:14 -0800 (PST) From: Keith <kwoody@citytel.net> To: Mel <fbsd.questions@rachie.is-a-geek.net> Cc: freebsd-questions@freebsd.org Subject: Re: Page Fault. Message-ID: <20081201122714.D81770@pop.citytel.net> In-Reply-To: <200812012031.25424.fbsd.questions@rachie.is-a-geek.net> References: <20081201101311.C81770@pop.citytel.net> <200812012031.25424.fbsd.questions@rachie.is-a-geek.net>
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On Mon, 1 Dec 2008, Mel wrote:
|->On Monday 01 December 2008 19:32:59 Keith wrote:
|->>
|->> ======
|->> kernel trap 12 with interrupts disabled
|->>
|->> Fatal trap 12: page fault while in kernel mode
|->> cpuid = 2; apic id = 02
|->> fault virtual address = 0x104
|->> fault code = supervisor read, page not present
|->> instruction pointer = 0x20:0xc066ca51
|->> stack pointer = 0x28:0xe6ec0c90
|->> frame pointer = 0x28:0xe6ec0c9c
|->> code segment = base 0x0, limit 0xfffff, type 0x1b
|->> = DPL 0, pres 1, def32 1, gran 1
|->> processor eflags = resume, IOPL = 0
|->> current process = 9 (thread taskq)
|->> trap number = 12
|->> panic: page fault
|->> Uptime: 6d6h23m45s
|->> #0 doadump () at pcpu.h:165
|->> 165 __asm __volatile("movl %%fs:0,%0" : "=r" (td));
|->> ============
|->>
|->frame 0 useless. You need the frame after calltrap().
|->And:
|->
|->> instruction pointer = 0x20:0xc066ca51
|->list *0xc066ca51
|->
|->Generally a bt will show the needed information.
|->Likely cause: file system corruption, caused by background_fsck, but a
|->backtrace should show more.
Ok, so how does one fix corruption if that is the case? Here is a
backtrace, but means nothing to me unfortunately.
(kgdb) backtrace
#0 doadump () at pcpu.h:165
#1 0xc067582a in boot (howto=260) at ../../../kern/kern_shutdown.c:409
#2 0xc0675b51 in panic (fmt=0xc08f090b "%s") at
../../../kern/kern_shutdown.c:565
#3 0xc0899f1c in trap_fatal (frame=0xe6ec0c50, eva=260) at
../../../i386/i386/trap.c:837
#4 0xc089968e in trap (frame={tf_fs = 8, tf_es = -920256472, tf_ds =
-420741080, tf_edi = -936184704, tf_esi = 4, tf_ebp = -420737892, tf_isp
= -420737924, tf_ebx = -920236452, tf_edx = 6, tf_ecx = -936306488, tf_eax = 1, tf_trapno = 12,
tf_err = 0, tf_eip = -1067005359, tf_cs = 32, tf_eflags = 65538, tf_esp =
-930065784, tf_ss = 4}) at ../../../i386/i386/trap.c:270
#5 0xc08859ca in calltrap () at ../../../i386/i386/exception.s:139
#6 0xc066ca51 in _mtx_lock_sleep (m=0xc9264e5c, tid=3358782592, opts=0,
file=0x0, line=0) at ../../../kern/kern_mutex.c:546
#7 0xc06bbdb6 in unp_gc (arg=0x0, pending=1) at
../../../kern/uipc_usrreq.c:1714
#8 0xc06964d3 in taskqueue_run (queue=0xc843fa80) at
../../../kern/subr_taskqueue.c:257
#9 0xc06969b6 in taskqueue_thread_loop (arg=0x1) at
../../../kern/subr_taskqueue.c:376
#10 0xc065ef6d in fork_exit (callout=0xc0696924 <taskqueue_thread_loop>,
arg=0xc09f1d28, frame=0xe6ec0d38) at ../../../kern/kern_fork.c:821
#11 0xc0885a2c in fork_trampoline () at ../../../i386/i386/exception.s:208
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