From owner-freebsd-questions@FreeBSD.ORG  Fri Jun 13 23:12:18 2008
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id E081D1065671
	for <freebsd-questions@freebsd.org>;
	Fri, 13 Jun 2008 23:12:18 +0000 (UTC)
	(envelope-from kris@FreeBSD.org)
Received: from weak.local (freefall.freebsd.org [IPv6:2001:4f8:fff6::28])
	by mx1.freebsd.org (Postfix) with ESMTP id 6CA878FC2C;
	Fri, 13 Jun 2008 23:12:17 +0000 (UTC)
	(envelope-from kris@FreeBSD.org)
Message-ID: <4852FED0.2010805@FreeBSD.org>
Date: Sat, 14 Jun 2008 01:12:16 +0200
From: Kris Kennaway <kris@FreeBSD.org>
User-Agent: Thunderbird 2.0.0.14 (Macintosh/20080421)
MIME-Version: 1.0
To: Bruce Cran <bruce@cran.org.uk>
References: <4852CF49.2000304@cwis.biz> <20080613215908.25d71e6e@tau>
In-Reply-To: <20080613215908.25d71e6e@tau>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: Ryan Coleman <ryan.coleman@cwis.biz>, freebsd-questions@freebsd.org
Subject: Re: Intermittent -- yet regular -- v6.3 kernel panic
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 13 Jun 2008 23:12:19 -0000

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.
> 

It's quite likely to be due to bad hardware though.

Kris