Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751979Ab1DSDwb (ORCPT ); Mon, 18 Apr 2011 23:52:31 -0400 Received: from amavis-outgoing1.knology.net ([24.214.64.230]:36280 "EHLO amavis-outgoing1.knology.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751282Ab1DSDwa (ORCPT ); Mon, 18 Apr 2011 23:52:30 -0400 X-Greylist: delayed 1213 seconds by postgrey-1.27 at vger.kernel.org; Mon, 18 Apr 2011 23:52:30 EDT Subject: Re: [Bug #32982] Kernel locks up a few minutes after boot From: David Dillow To: Bart Van Assche Cc: Jens Axboe , Linus Torvalds , "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List , Maciej Rutecki , Florian Mickler , Neil Brown In-Reply-To: References: <_H4l51C1wXN.A.yDC.yGuqNB@chimera> <4DAC2429.5000105@fusionio.com> Content-Type: text/plain; charset="UTF-8" Date: Mon, 18 Apr 2011 23:32:14 -0400 Message-ID: <1303183934.2585.12.camel@obelisk.thedillows.org> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 (2.30.3-1.fc13) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1220 Lines: 28 On Mon, 2011-04-18 at 20:21 +0200, Bart Van Assche wrote: > On Mon, Apr 18, 2011 at 1:44 PM, Jens Axboe wrote: > > 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. > > md seems to work stable with the resulting tree, but it looks there is > a performance regression in the block layer not related to the md > issue. If I run a small block IOPS test on a block device created by > ib_srp (NOOP scheduler) I see about 11% less IOPS than with 2.6.38.3 > (155.000 IOPS with 2.6.38.3 and 140.000 IOPS with 2.6.39-rc3+). The mapping code for ib_srp changed in 2.6.39-rc1, but it showed improved IOPS for a similar setup in my testing so I'd be surprised if it is the culprit. Still, it wouldn't hurt to check. Do you have time to try the new ib_srp code with 2.6.38.3 to eliminate it from the equation? Thanks, Dave -- 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/