From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933998AbXCUT7y (ORCPT ); Wed, 21 Mar 2007 15:59:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933996AbXCUT7y (ORCPT ); Wed, 21 Mar 2007 15:59:54 -0400 Received: from brick.kernel.dk ([62.242.22.158]:25477 "EHLO kernel.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933998AbXCUT7w (ORCPT ); Wed, 21 Mar 2007 15:59:52 -0400 Date: Wed, 21 Mar 2007 20:59:28 +0100 From: Jens Axboe To: Dale Blount Cc: Chuck Ebbert , linux-kernel@vger.kernel.org Subject: Re: PROBLEM: null pointer dereference in cfq_dispatch_requests (2.6.21-rc2 and 2.6.20) Message-ID: <20070321195928.GG15024@kernel.dk> References: <1172685755.5773.6.camel@dwillia2-linux.ch.intel.com> <200703011308.28266.linux@f-seidel.de> <20070301123057.GO23985@kernel.dk> <460174EC.8000608@redhat.com> <1174501407.14261.34.camel@dale.velocity.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1174501407.14261.34.camel@dale.velocity.net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 21 2007, Dale Blount wrote: > On Wed, 2007-03-21 at 14:09 -0400, Chuck Ebbert wrote: > > Dale Blount wrote: > > >> I'm puzzled why this is hitting Dan, but no one else has reported > > >> anything. Dan, did 2.6.19 work for you? > > > > > > Actually, I believe it is happening to me too. This is on a 4-disk raid5 with > > > one failed disk on two 2-port sata_sil pci controller cards. > > > > > > The BUG below is from 2.6.20.3, but I will try 2.6.21-rc4 tonight. > > > The disk didn't fail until 2.6.20, so I don't know if 2.6.19 would have worked > > > or not. > > > > > > > > > > Just to be clear: you have a RAID array (what level?) with a failed disk > > and it's giving you the same error that Dan gets? > > > Yes, the BUG looks to be pretty similar to me. It's a 4 disk raid5 with > one disk missing (dead and sent in for RMA). Interesting, I'll definitely see if I can reproduce it like that. -- Jens Axboe