Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755220Ab1CQSbN (ORCPT ); Thu, 17 Mar 2011 14:31:13 -0400 Received: from mx1.fusionio.com ([64.244.102.30]:59893 "EHLO mx1.fusionio.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754961Ab1CQSbI (ORCPT ); Thu, 17 Mar 2011 14:31:08 -0400 X-ASG-Debug-ID: 1300386667-03d6a54f628d820001-xx1T2L X-Barracuda-Envelope-From: JAxboe@fusionio.com Message-ID: <4D825367.90408@fusionio.com> Date: Thu, 17 Mar 2011 19:31:03 +0100 From: Jens Axboe MIME-Version: 1.0 To: Mike Snitzer CC: "linux-kernel@vger.kernel.org" , "hch@infradead.org" Subject: Re: [PATCH 05/10] block: remove per-queue plugging References: <1295659049-2688-1-git-send-email-jaxboe@fusionio.com> <1295659049-2688-6-git-send-email-jaxboe@fusionio.com> <20110303221353.GA10366@redhat.com> <4D761E0D.8050200@fusionio.com> <20110308202100.GA31744@redhat.com> <4D76912C.9040705@fusionio.com> <20110308220526.GA393@redhat.com> <20110317155120.GA9220@redhat.com> X-ASG-Orig-Subj: Re: [PATCH 05/10] block: remove per-queue plugging In-Reply-To: <20110317155120.GA9220@redhat.com> 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: 1300386667 X-Barracuda-URL: http://10.101.1.180:8000/cgi-mod/mark.cgi X-Barracuda-Spam-Score: 0.00 X-Barracuda-Spam-Status: No, SCORE=0.00 using per-user 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 3.2.2.58181 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: 1716 Lines: 45 On 2011-03-17 16:51, Mike Snitzer wrote: > On Tue, Mar 08 2011 at 5:05pm -0500, > Mike Snitzer wrote: > >> On Tue, Mar 08 2011 at 3:27pm -0500, >> Jens Axboe wrote: >> >>> On 2011-03-08 21:21, Mike Snitzer wrote: >>>> On Tue, Mar 08 2011 at 7:16am -0500, >>>> Jens Axboe wrote: >>>> >>>>> On 2011-03-03 23:13, Mike Snitzer wrote: >>>>>> I'm now hitting a lockdep issue, while running a 'for-2.6.39/stack-plug' >>>>>> kernel, when I try an fsync heavy workload to a request-based mpath >>>>>> device (the kernel ultimately goes down in flames, I've yet to look at >>>>>> the crashdump I took) >>>>> >>>>> Mike, can you re-run with the current stack-plug branch? I've fixed the >>>>> !CONFIG_BLOCK and rebase issues, and also added a change for this flush >>>>> on schedule event. It's run outside of the runqueue lock now, so >>>>> hopefully that should solve this one. >>>> >>>> Works for me, thanks. >>> >>> Super, thanks! Out of curiousity, did you use dm/md? >> >> Yes, I've been using a request-based DM multipath device. > > > Against latest 'for-2.6.39/core', I just ran that same fsync heavy > workload against XFS (ontop of a DM multipath volume). ffsb induced the > following hangs (ripple effect causing NetworkManager to get hung up on > this data-only XFS volume, etc): Ugh. Care to send the recipee for how to reproduce this? Essentially just looks like IO got stuck. -- 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/