From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2992440AbXDRNTT (ORCPT ); Wed, 18 Apr 2007 09:19:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S2992442AbXDRNTT (ORCPT ); Wed, 18 Apr 2007 09:19:19 -0400 Received: from wasp.net.au ([203.190.192.17]:40790 "EHLO wasp.net.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2992440AbXDRNTS (ORCPT ); Wed, 18 Apr 2007 09:19:18 -0400 Message-ID: <46261ACE.1050407@wasp.net.au> Date: Wed, 18 Apr 2007 17:19:10 +0400 From: Brad Campbell User-Agent: Thunderbird 1.5.0.10 (X11/20070306) MIME-Version: 1.0 To: Jens Axboe CC: Neil Brown , Chuck Ebbert , lkml Subject: Re: [OOPS] 2.6.21-rc6-git5 in cfq_dispatch_insert 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> In-Reply-To: <20070418123757.GC3796@kernel.dk> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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. Brad -- "Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so." -- Douglas Adams