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Date:      Tue, 4 Mar 2003 15:34:42 +0200
From:      Peter Pentchev <roam@ringlet.net>
To:        Vikash Badal - PCS <VikashB@ComparexAfrica.co.za>
Cc:        stable@FreeBSD.ORG
Subject:   Re: 4.8-PRE (and earlier) crash - syncookies?
Message-ID:  <20030304133442.GD554@straylight.oblivion.bg>
In-Reply-To: <501BF453CDCFD111A6E40080C83DAC04E4C2ED@PSICS001>
References:  <501BF453CDCFD111A6E40080C83DAC04E4C2ED@PSICS001>

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On Tue, Mar 04, 2003 at 02:10:39PM +0200, Vikash Badal - PCS wrote:
> Greetings,
>=20
> > -----Original Message-----
> > From: Peter Pentchev [mailto:roam@ringlet.net]
> > Sent: 04 March 2003 01:59
> > To: stable@FreeBSD.ORG
> > Subject: 4.8-PRE (and earlier) crash - syncookies?
> >=20
> >=20
> > Hi,
> >=20
> > I think this has been going on for a couple of months;=20
> > unfortunately, I
> > cannot remember exactly when it started :(  Several machines,=20
> > which have
> > always been updated synchronously at intervals of a couple of weeks or
> > so, have been experiencing panics every few days with recent=20
> > 4.6-STABLE,
> > 4.7-STABLE, and 4.8-PRERELEASE kernel+world.
> >=20
> > Attached is the kernel config and a gdb session of the most recent
> > crashdump.  Maybe the most interesting part is at the end of the gdb
> > session: is there a normal reason why a TAILQ structure would have a
> > null start pointer, and an end pointer pointing back to itself?
> >=20
> > G'luck,
> > Peter
> >=20
>=20
> Have you checked your RAM or tried different RAM modules,
>=20
> >Fatal trap 12: page fault while in kernel mode
> >fault code		=3D supervisor read, page not present
>=20
> I had a problem recently with my 4.7-STABLE server with trap 12
> and it turned out to be the RAM that was shot!

I do not really think this is a case of faulty RAM; as I mentioned
above, this happens on several machines, with always the same faults
with the same backtrace in the same kernel locations.

G'luck,
Peter

--=20
Peter Pentchev	roam@ringlet.net    roam@sbnd.net    roam@FreeBSD.org
PGP key:	http://people.FreeBSD.org/~roam/roam.key.asc
Key fingerprint	FDBA FD79 C26F 3C51 C95E  DF9E ED18 B68D 1619 4553
If this sentence didn't exist, somebody would have invented it.

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