Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753065Ab1DQWVM (ORCPT ); Sun, 17 Apr 2011 18:21:12 -0400 Received: from cantor2.suse.de ([195.135.220.15]:51512 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751641Ab1DQWVG convert rfc822-to-8bit (ORCPT ); Sun, 17 Apr 2011 18:21:06 -0400 Date: Mon, 18 Apr 2011 08:20:52 +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: <20110418082052.07476d4a@notabene.brown> In-Reply-To: <20110418070711.12dd5cc1@notabene.brown> References: <_H4l51C1wXN.A.yDC.yGuqNB@chimera> <20110418070711.12dd5cc1@notabene.brown> 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: 2271 Lines: 52 On Mon, 18 Apr 2011 07:07:11 +1000 NeilBrown wrote: > 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). > Actually it won't be today. The new block device plugging is still unusable for MD - so I won't be able to fix this until that gets sorted out. NeilBrown -- 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/