From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261354AbUJZRV5 (ORCPT ); Tue, 26 Oct 2004 13:21:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261355AbUJZRV5 (ORCPT ); Tue, 26 Oct 2004 13:21:57 -0400 Received: from zamok.crans.org ([138.231.136.6]:32992 "EHLO zamok.crans.org") by vger.kernel.org with ESMTP id S261354AbUJZRVw convert rfc822-to-8bit (ORCPT ); Tue, 26 Oct 2004 13:21:52 -0400 To: Bartlomiej Zolnierkiewicz Cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.9-mm1: LVM stopped working References: <87oeitdogw.fsf@barad-dur.crans.org> <58cb370e041026070067daa404@mail.gmail.com> <58cb370e0410261007145fc22c@mail.gmail.com> From: Mathieu Segaud Date: Tue, 26 Oct 2004 19:21:50 +0200 In-Reply-To: <58cb370e0410261007145fc22c@mail.gmail.com> (Bartlomiej Zolnierkiewicz's message of "Tue, 26 Oct 2004 19:07:45 +0200") Message-ID: <87is8xl7ip.fsf@barad-dur.crans.org> User-Agent: Gnus/5.110003 (No Gnus v0.3) Emacs/21.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Bartlomiej Zolnierkiewicz disait dernièrement que : > To make this task easier I prepared 2.6.9-rc3-mm3 to 2.6.9-mm1 IDE patch: > > http://home.elka.pw.edu.pl/~bzolnier/ide-2.6.9-rc3-mm3-to-2.6.9-mm1.patch.bz2 > > Just revert it from 2.6.9-mm1. thx, I will test it soon. I have just made straces of vgchange processes in success and failure cases (there is little difference in the fact that in the failure case, I added -v verbose option but that's all) vgchange tries to read 2 chunks of data from the partition: - the first 2048 bytes, - and after closing device, and reopening it, the 512 next ones. in the failure case, the first read succeeds with just 1536 bytes read, which causes the process to issue another read syscall to read the "missing" 512 bytes, which fails... for now, that's all I can see I will enable lvm debugging, for the next try the straces are: http://www.crans.org/~segaud/vgchange.failure http://www.crans.org/~segaud/vgchange.succeeded (names are obvious) Best regards, Mathieu -- "I am a living example of someone who took on an issue and benefited from it." George W. Bush April 25, 2001 Speaking to John King of CNN.