From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id o9A1tR8d199368 for ; Sat, 9 Oct 2010 20:55:29 -0500 Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id C5B1318E95BB for ; Sat, 9 Oct 2010 18:56:32 -0700 (PDT) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id OPsJa5NW2NNZr7qt for ; Sat, 09 Oct 2010 18:56:32 -0700 (PDT) Date: Sun, 10 Oct 2010 12:56:28 +1100 From: Dave Chinner Subject: Re: kernel crash 2.6.31.14-0.1-xen from openSUSE 11.2 Message-ID: <20101010015628.GL4681@dastard> References: <201010092355.17240@zmi.at> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <201010092355.17240@zmi.at> List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: Michael Monnerie Cc: xfs@oss.sgi.com On Sat, Oct 09, 2010 at 11:55:16PM +0200, Michael Monnerie wrote: > I just had a bug in one VM, and don't know if this is XFS related, but it seems so. > > [1172140.926859] BUG: unable to handle kernel paging request at 00000003d03dd178 > [1172140.926877] IP: [] dequeue_task+0x72/0x110 > [1172140.926897] PGD 1b54b067 PUD 0 > [1172140.926897] Thread overran stack, or stack corrupted ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The stack trace shows pdflush doing writeback, and way down the stack doing a memory allocation that triggered direct reclaim, which caused writeback to occur, which blew the stack..... Cheers, Dave. -- Dave Chinner david@fromorbit.com _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs