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Date:      Fri, 13 Jun 2008 16:14:13 -0500
From:      Ryan Coleman <ryan.coleman@cwis.biz>
To:        Bruce Cran <bruce@cran.org.uk>
Cc:        freebsd-questions@freebsd.org
Subject:   Re: Intermittent -- yet regular -- v6.3 kernel panic
Message-ID:  <4852E325.7090901@cwis.biz>
In-Reply-To: <20080613215908.25d71e6e@tau>
References:  <4852CF49.2000304@cwis.biz> <20080613215908.25d71e6e@tau>

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I will attempt to do this and report back when it happens again.

Bruce Cran wrote:
> On Fri, 13 Jun 2008 14:49:29 -0500
> Ryan Coleman <ryan.coleman@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.
>
>   




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