From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754800AbXFXUbx (ORCPT ); Sun, 24 Jun 2007 16:31:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751942AbXFXUbq (ORCPT ); Sun, 24 Jun 2007 16:31:46 -0400 Received: from esuna.co.uk ([83.223.102.198]:56329 "EHLO mail.esuna.co.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751827AbXFXUbq (ORCPT ); Sun, 24 Jun 2007 16:31:46 -0400 Message-ID: <467ED4A8.4080500@esuna.co.uk> Date: Sun, 24 Jun 2007 21:31:36 +0100 From: "Jay L. T. Cornwall" User-Agent: Thunderbird 2.0.0.4 (Windows/20070604) MIME-Version: 1.0 To: Jay Cliburn CC: linux-kernel@vger.kernel.org Subject: Re: 2.6.22-rc5: pdflush oops under heavy disk load References: <467B12CA.5060405@esuna.co.uk> <467BE118.4090308@redhat.com> <467BE4F1.7040308@esuna.co.uk> <467D0EB0.9030100@esuna.co.uk> <20070624125957.2e27820c@osprey.hogchain.net> In-Reply-To: <20070624125957.2e27820c@osprey.hogchain.net> X-Enigmail-Version: 0.95.1 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Jay Cliburn wrote: >> The common factor here seems to be the buffer_head circular list >> leading to invalid pointers in bh->b_this_page. >> >> I'm beginning to suspect the Attansic L1 Gigabit Etherner driver >> (marked as EXPERIMENTAL in 2.6.22-rc5). I can't reproduce these >> panics on disk-to-disk copies or SCP across the localhost interface. >> However, SCP from a server onto either of two different HDDs hits >> these oopses fairly quickly. > How much RAM is installed in your machine? If it's 4GB or more, does > your problem go away if you boot with mem=3000M? Intriguing. Yes, this machine has 4GB of RAM. If I boot with mem=3000M the problem does indeed go away - I can't induce an oops even after transferring tens of GB across the interface. I'm not sure I follow why that would be the case, except that it relates to pci_map_page behaviour. But I guess you have an inkling? -- Jay L. T. Cornwall, http://www.esuna.co.uk/~jay/ PhD Student Imperial College London