Intermittent -- yet regular -- v6.3 kernel panic

[Bruce Cran]

On Fri, 13 Jun 2008 14:49:29 -0500
Ryan Coleman <ryan.coleman at cwis.biz> wrote:

> Jun 12 23:02:41 UnixBox2 kernel: Fatal trap 12: page fault while in 
> kernel mode
> Jun 12 23:02:41 UnixBox2 kernel: cpuid = 1; apic id     = 01
> Jun 12 23:02:41 UnixBox2 kernel: fault virtual address  = 0x0
> Jun 12 23:02:41 UnixBox2 kernel: fault code             = supervisor 
> read, page not present
> Jun 12 23:02:41 UnixBox2 kernel: instruction pointer    = 0x20:0x0
> Jun 12 23:02:41 UnixBox2 kernel: stack pointer          =
> 0x28:0xec0ea8e0 Jun 12 23:02:41 UnixBox2 kernel: frame
> pointer          = 0x28:0xec0ea8e4 Jun 12 23:02:41 UnixBox2 kernel:
> code segment           = base 0x0, limit 0xfffff, type 0x1b
> Jun 12 23:02:41 UnixBox2 kernel: = DPL 0, pres 1, def32 1, gran 1
> Jun 12 23:02:41 UnixBox2 kernel: processor eflags       = interrupt 
> enabled, resume, IOPL = 0
> Jun 12 23:02:41 UnixBox2 kernel: current process        = 925 (cp)
> Jun 12 23:02:41 UnixBox2 kernel: trap number            = 12
> Jun 12 23:02:41 UnixBox2 kernel: panic: page fault
> Jun 12 23:02:41 UnixBox2 kernel: cpuid = 1
> Jun 12 23:02:41 UnixBox2 kernel: Uptime: 1h21m59s
> Jun 12 23:02:41 UnixBox2 kernel: Cannot dump. No dump device defined.
> 
> 
> This is a regular occurrence, but varies by source. Brand new fBSD
> 6.3 machine, what more information do I need to provide?

To be of any use we need a backtrace.  See 
http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug.html
for details.  First you need to configure a dump device then when
the system crashes a crash dump will be written to /var/crash by
default.  You then run kgdb on the file to get the backtrace.

-- 
Bruce Cran
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