From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2992443AbXDRNW7 (ORCPT ); Wed, 18 Apr 2007 09:22:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S2992448AbXDRNW6 (ORCPT ); Wed, 18 Apr 2007 09:22:58 -0400 Received: from agminet01.oracle.com ([141.146.126.228]:32873 "EHLO agminet01.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2992443AbXDRNW6 (ORCPT ); Wed, 18 Apr 2007 09:22:58 -0400 Date: Wed, 18 Apr 2007 15:21:57 +0200 From: Jens Axboe To: Brad Campbell Cc: Neil Brown , Chuck Ebbert , lkml Subject: Re: [OOPS] 2.6.21-rc6-git5 in cfq_dispatch_insert Message-ID: <20070418132157.GC3720@kernel.dk> References: <4621FAF0.7000705@wasp.net.au> <46220339.9080205@wasp.net.au> <4623FB29.1000603@redhat.com> <17956.22235.574867.179016@notabene.brown> <20070418123757.GC3796@kernel.dk> <46261ACE.1050407@wasp.net.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <46261ACE.1050407@wasp.net.au> X-Brightmail-Tracker: AAAAAQAAAAI= X-Brightmail-Tracker: AAAAAA== X-Whitelist: TRUE X-Whitelist: TRUE Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 18 2007, Brad Campbell wrote: > Jens Axboe wrote: > > >I had something similar for generic_unplug_request() as well, but didn't > >see/hear any reports of it being tried out. Here's a complete debugging > >patch for this and other potential dangers. > > > > I had a clean 2.6.21-rc7 that I forgot to change the default sched on take > down my main server last night. Another oops of the same variety. > Unfortunately only a digital photo to go by though. > > I've removed Neil's patch, applied yours and fired it up on my 4 drive test > box (the one that was causing the trouble before). I've finally scrounged > another machine for a serial logger and I'll beat it until it breaks. > Perhaps if I can get this to reliably trigger again we can track it down. Thanks for testing Brad, be sure to use the next patch I sent instead. The one from this mail shouldn't even get you booted. So double check that you are still using CFQ :-) -- Jens Axboe