Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752575Ab1DRLov (ORCPT ); Mon, 18 Apr 2011 07:44:51 -0400 Received: from mx2.fusionio.com ([64.244.102.31]:37775 "EHLO mx2.fusionio.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752033Ab1DRLop (ORCPT ); Mon, 18 Apr 2011 07:44:45 -0400 X-ASG-Debug-ID: 1303127081-01de284cf815c730001-xx1T2L X-Barracuda-Envelope-From: JAxboe@fusionio.com Message-ID: <4DAC2429.5000105@fusionio.com> Date: Mon, 18 Apr 2011 13:44:41 +0200 From: Jens Axboe MIME-Version: 1.0 To: Bart Van Assche CC: Linus Torvalds , "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List , Maciej Rutecki , Florian Mickler , Neil Brown Subject: Re: [Bug #32982] Kernel locks up a few minutes after boot References: <_H4l51C1wXN.A.yDC.yGuqNB@chimera> X-ASG-Orig-Subj: Re: [Bug #32982] Kernel locks up a few minutes after boot In-Reply-To: Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mail1.int.fusionio.com[10.101.1.21] X-Barracuda-Start-Time: 1303127081 X-Barracuda-URL: http://10.101.1.181:8000/cgi-mod/mark.cgi X-Barracuda-Spam-Score: 0.00 X-Barracuda-Spam-Status: No, SCORE=0.00 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=9.0 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.61209 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2137 Lines: 55 On 2011-04-17 20:37, 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). > > 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, can you try and pull: git://git.kernel.dk/linux-2.6-block.git for-linus into Linus' tree and see if that works? This has, among other things, Neils fixes for MD. -- Jens Axboe -- 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/