From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S637747AbXDSMzI (ORCPT ); Thu, 19 Apr 2007 08:55:08 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S637756AbXDSMzH (ORCPT ); Thu, 19 Apr 2007 08:55:07 -0400 Received: from brick.kernel.dk ([80.160.20.94]:3568 "EHLO kernel.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S637747AbXDSMzG (ORCPT ); Thu, 19 Apr 2007 08:55:06 -0400 Date: Thu, 19 Apr 2007 14:52:36 +0200 From: Jens Axboe To: "Vladimir V. Saveliev" Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-aio@kvack.org, reiserfs-dev@namesys.com, linux-mm@kvack.org Subject: Re: dio_get_page() lockdep complaints Message-ID: <20070419125236.GF11780@kernel.dk> References: <20070419073828.GB20928@kernel.dk> <20070419012540.bed394e2.akpm@linux-foundation.org> <20070419083407.GD20928@kernel.dk> <200704191643.38367.vs@namesys.com> <20070419124933.GE11780@kernel.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070419124933.GE11780@kernel.dk> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Apr 19 2007, Jens Axboe wrote: > > I tried fio (1.15) with this job file and did not get the possible > > circular locking dependency detected > > Perhaps some of the preempt settings? The box is an emc centera, it's a > lowly p4/ht. As I mentioned, the rootfs is on reiser. So something in the boot up scripts may trigger something that gets reiser to run through that path with the wrong locking order. After the box is done booting, the dmesg is clean. I then mount the ext3 fs and run the fio test, the lockdep trace shows up immediately. The distro is SLES9. -- Jens Axboe