Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753200Ab1DQVHb (ORCPT ); Sun, 17 Apr 2011 17:07:31 -0400 Received: from cantor2.suse.de ([195.135.220.15]:50133 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751990Ab1DQVH0 convert rfc822-to-8bit (ORCPT ); Sun, 17 Apr 2011 17:07:26 -0400 Date: Mon, 18 Apr 2011 07:07:11 +1000 From: NeilBrown To: Bart Van Assche Cc: Linus Torvalds , "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List , Maciej Rutecki , Florian Mickler , Jens Axboe Subject: Re: [Bug #32982] Kernel locks up a few minutes after boot Message-ID: <20110418070711.12dd5cc1@notabene.brown> In-Reply-To: References: <_H4l51C1wXN.A.yDC.yGuqNB@chimera> X-Mailer: Claws Mail 3.7.8 (GTK+ 2.22.1; x86_64-unknown-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2305 Lines: 58 On Sun, 17 Apr 2011 20:37:39 +0200 Bart Van Assche wrote: > On Sun, Apr 17, 2011 at 7:03 PM, Linus Torvalds > wrote: > > On Sun, Apr 17, 2011 at 5:57 AM, Rafael J. Wysocki wrote: > > > This message has been generated automatically as a part of a summary report > > > of recent regressions. > > > > > > The following bug entry is on the current list of known regressions > > > from 2.6.38. ?Please verify if it still should be listed and let the tracking team > > > know (either way). > > > > > > > > > Bug-Entry ? ? ? : http://bugzilla.kernel.org/show_bug.cgi?id=32982 > > > Subject ? ? ? ? : Kernel locks up a few minutes after boot > > > Submitter ? ? ? : Bart Van Assche > > > Date ? ? ? ? ? ?: 2011-04-10 19:55 (8 days old) > > > > Is this machine running a RAID5 setup or something like that? > > > > There is a known interaction with the new block layer plugging code > > and MD. The "hung task" report in that bugzilla looks very much like > > that issue. And you do have "root=/dev/md0", so clearly there's some > > md thing going on. > > > > And bisecting might not work all that well for it, because I suspect > > it ends up being very much a matter of IO patterns how it triggers. > > > > Neil supposedly has a patch for it, but I haven't seen it yet. Neil, Jens? > > (converted top-posting into bottom-posting) > > Hello Linus, > > On the system on which bug #32982 has been triggered md0, md1 and md2 > have been configured as two-disk RAID1 (mirroring). If any of those have write-intent bitmaps then I definitely know what the problem is and I'll be posting patches later today (probably not much later). If not .. then I'm less sure but it would certainly be worth testing after applying the promised fixes. NeilBrown > > I've done my best to trigger enough I/O in order to obtain reliable > bisect results. A difficulty I encountered during bisecting though was > that I encountered unbootable kernels (all skipped revisions). > > Bart. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/