From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755120AbZDVQam (ORCPT ); Wed, 22 Apr 2009 12:30:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752612AbZDVQad (ORCPT ); Wed, 22 Apr 2009 12:30:33 -0400 Received: from brick.kernel.dk ([93.163.65.50]:36423 "EHLO kernel.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752150AbZDVQad (ORCPT ); Wed, 22 Apr 2009 12:30:33 -0400 Date: Wed, 22 Apr 2009 18:30:32 +0200 From: Jens Axboe To: Steve Wise Cc: balbir@linux.vnet.ibm.com, Andrew Morton , "linux-kernel@vger.kernel.org" , Wolfram Strepp Subject: Re: [BUG] rbtree bug with mmotm 2009-04-14-17-24 Message-ID: <20090422163032.GV4593@kernel.dk> References: <20090421184223.GP19637@balbir.in.ibm.com> <49EE42CC.7070002@opengridcomputing.com> <20090422131703.GO4593@kernel.dk> <49EF2882.1020306@opengridcomputing.com> <49EF293F.4030504@opengridcomputing.com> <49EF2C32.4030409@opengridcomputing.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <49EF2C32.4030409@opengridcomputing.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 22 2009, Steve Wise wrote: > >>> >>> No there are a few patches applied that are heading upstream, but one >>> is in the NFS RDMA server which isn't loaded yet and the rest are in >>> iw_cxgb3 (iwarp driver) which also hasn't loaded at the time we >>> crash. NOTE: Out of 4 power cycles, one booted up ok, 3 hit the >>> crash. >>> >>> >>> >> >> By the way, this one looks different from the last one I saw. So its >> not consistently crashing in the same spot. The one I hit yesterday >> (which I don't have the OOPs dump for was in rb_erase(). >> >> Steve. > > I'll start bisecting to isolate this. Don't bother, I see what the bug is now. It's caused by commit a36e71f996e25d6213f57951f7ae1874086ec57e and it's due to ->ioprio being changed without the prio rb root being adjusted. I'll provide a fix shortly. -- Jens Axboe