From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266511AbUG0T0s (ORCPT ); Tue, 27 Jul 2004 15:26:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266513AbUG0T0r (ORCPT ); Tue, 27 Jul 2004 15:26:47 -0400 Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:62621 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id S266511AbUG0T0Q (ORCPT ); Tue, 27 Jul 2004 15:26:16 -0400 Date: Tue, 27 Jul 2004 20:26:15 +0100 From: viro@parcelfarce.linux.theplanet.co.uk To: Gene Heskett Cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.8-rc2 crashes Message-ID: <20040727192615.GG12308@parcelfarce.linux.theplanet.co.uk> References: <200407271233.04205.gene.heskett@verizon.net> <20040727142918.GE12308@parcelfarce.linux.theplanet.co.uk> <200407271315.22075.gene.heskett@verizon.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200407271315.22075.gene.heskett@verizon.net> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 27, 2004 at 01:15:22PM -0400, Gene Heskett wrote: > On Tuesday 27 July 2004 10:29, viro@parcelfarce.linux.theplanet.co.uk wrote: > >On Tue, Jul 27, 2004 at 12:33:04PM -0400, Gene Heskett wrote: > >> Greetings everybody; > >> > >> I have now had 4 crashes while running 2.6.8-rc2, the last one > >> requiring a full powerdown before the intel-8x0 could > >> re-establish control over the sound. > >> > >> All have had an initial Opps located in prune_dcache, and were > >> logged as follows: > >> Jul 27 07:58:58 coyote kernel: Unable to handle kernel NULL > >> pointer dereference at virtual address 00000000 > > > >... which means that dentry_unused list got corrupted, which doesn't > > really help. Could you try to narrow it down to 2.6.8-rc1-bk? > > I got the bright idea of doing some cmp's on that code module, and > its identical all the way back to 2.6.7-mm1, (I have them all) but > differs at 2.6.7: Doesn't help - all we know is that at some point in a cyclic list we'd got NULL instead of a pointer to the next list element. Could've happened for any number of reasons. What filesystems do you have on that box, BTW?