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Date:      Wed, 21 Aug 2002 14:51:47 +0930
From:      Greg 'groggy' Lehey <grog@FreeBSD.org>
To:        Patrick O'Reilly <bsd@perimeter.co.za>
Cc:        FreeBSD Question List <freebsd-questions@freebsd.org>
Subject:   Re: ! Fatal trap 12: System Crash twice in last 2 days
Message-ID:  <20020821052147.GF78608@wantadilla.lemis.com>
In-Reply-To: <025201c24833$3144f550$b50d030a@PATRICK>
References:  <025201c24833$3144f550$b50d030a@PATRICK>

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Computer output wrapped.

On Tuesday, 20 August 2002 at 12:20:14 +0200, Patrick O'Reilly wrote:
> Help Please - my previously stable system has become rather unstable!
>
> On Sunday evening at 22:21 (about 3 hours after completing the upgrade
> from 4.6.1) the box crashed and restarted of it's own accord.  And it
> just did the same again about half an hour ago (11:46 Tuesday).
>
> I have included extracts from /var/log/messages below.  The significant
> part seems to be:
> ---
> Fatal trap 12: page fault while in kernel mode
> ---
> Unfortunately this means nothing to me :(

It doesn't mean much to me by itself.

> I notice that the "current process" on these two occasions is NOT the
> same (rateup on Sunday, perl today).  But I have no idea whether that is
> significant at all.
>
> Any advice would be VERY MUCH appreciated!  Also, please let me know
> what other info would be useful in helping resolve this problem.
>
> /var/log/messages from Sunday evening:
> ---
> Aug 18 22:21:05 obelix /kernel:
> Aug 18 22:21:05 obelix /kernel:
> Aug 18 22:21:05 obelix /kernel: Fatal trap 12: page fault while in kernel mode
> Aug 18 22:21:05 obelix /kernel: fault virtual address   = 0x0

(etc).

None of this is much help.  You need to build a debug kernel and get a
dump and a stack trace, then we can see what's going on.

Greg
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