From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265303AbUAEV0h (ORCPT ); Mon, 5 Jan 2004 16:26:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265849AbUAEV0h (ORCPT ); Mon, 5 Jan 2004 16:26:37 -0500 Received: from wblv-238-222.telkomadsl.co.za ([165.165.238.222]:41345 "EHLO gateway.lan") by vger.kernel.org with ESMTP id S265303AbUAEV0c (ORCPT ); Mon, 5 Jan 2004 16:26:32 -0500 Subject: Re: File system cache corruption in 2.6? From: Martin Schlemmer Reply-To: azarah@nosferatu.za.org To: Jens Axboe Cc: "Nathaniel W. Filardo" , Linux Kernel Mailing Lists In-Reply-To: <20040105121905.GB3124@suse.de> References: <20040105121905.GB3124@suse.de> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-9G3u5wUWO6KKVdNWHssd" Message-Id: <1073338159.6075.339.camel@nosferatu.lan> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.5 Date: Mon, 05 Jan 2004 23:29:19 +0200 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --=-9G3u5wUWO6KKVdNWHssd Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Mon, 2004-01-05 at 14:19, Jens Axboe wrote: > On Mon, Jan 05 2004, Nathaniel W. Filardo wrote: > > Hi all, > > I'm trying to work out the cause of a series of issues I've seen > > on my 2.6 machine. It appears as though files (specifically libraries)= in > > memory can get corrupted, resulting in strangeness like segfaults and > > things like "relocation error: can't find symbol ...-VOMD-POINTER" inst= ead > > of "...-VOID-POINTER". >=20 > That's a single bit error. >=20 > > I don't believe it's actual hardware failure for a few reasons: memtest= 86 > > passes all tests, GCC doesn't crash (it's a Gentoo system, so gcc and I > > are well acquainted - and before I get jumped on, I've installed udev ;= ) > > ), and most importantly, sometimes thrashing the file system or engagin= g a > > kernel compile will rectify the situation, as just happened with emacs. > > It crashed, I killed it, it wouldn't load - I started a kernel compile, > > waited a bit, and lo', it works again. No messages of relevance appear= in > > dmesg. >=20 > It looks _extremely_ much like bad memory, or bad hardware. Sometimes > memtest just doesn't catch all errors (how long did you run it? needs > several days often). Also, go to the options, and turn on caching, as well as all memory addresses and tests ... (keys pressed if I can remember, is: c->1->2->2->3->3->3 should turn on above options for memtest). --=20 Martin Schlemmer --=-9G3u5wUWO6KKVdNWHssd Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQA/+dcvqburzKaJYLYRAqvHAJ47UzBn0uEL7laarh1guRv8BmgR2QCfQ6r2 EP8l11Sw+3xoU8S3d7xWyFI= =dBfO -----END PGP SIGNATURE----- --=-9G3u5wUWO6KKVdNWHssd--