Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754008Ab3F0PjD (ORCPT ); Thu, 27 Jun 2013 11:39:03 -0400 Received: from dkim2.fusionio.com ([66.114.96.54]:51364 "EHLO dkim2.fusionio.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753340Ab3F0PjA convert rfc822-to-8bit (ORCPT ); Thu, 27 Jun 2013 11:39:00 -0400 X-ASG-Debug-ID: 1372347539-0421b50221949b0001-xx1T2L X-Barracuda-Envelope-From: clmason@fusionio.com Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT To: Dave Jones From: Chris Mason In-Reply-To: <20130627151922.GA1438@redhat.com> CC: Linux Kernel , References: <20130627145824.GA21540@redhat.com> <20130627150130.14981.39849@localhost.localdomain> <20130627151922.GA1438@redhat.com> Message-ID: <20130627153857.14981.14731@localhost.localdomain> User-Agent: alot/0.3.4 Subject: Re: btrfs triggered lockdep WARN. Date: Thu, 27 Jun 2013 11:38:57 -0400 X-ASG-Orig-Subj: Re: btrfs triggered lockdep WARN. X-Originating-IP: [10.101.1.160] X-Barracuda-Connect: cas2.int.fusionio.com[10.101.1.41] X-Barracuda-Start-Time: 1372347539 X-Barracuda-Encrypted: AES128-SHA 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 3.2.2.135126 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: 1147 Lines: 30 Quoting Dave Jones (2013-06-27 11:19:22) > On Thu, Jun 27, 2013 at 11:01:30AM -0400, Chris Mason wrote: > > Quoting Dave Jones (2013-06-27 10:58:24) > > > Another bug caused by this script. https://github.com/kernelslacker/io-tests/blob/master/setup.sh > > > > I'm still struggling to reproduce that one here. I've tried every > > variation I can think of but I'll try again. > > Note that this is a different trace to the other post about that script. Yeah, but I haven't hit anything unusual at all yet. > > > I really hope you don't already have CONFIG_DEBUG_PAGE_ALLOC turned on, > > maybe it will catch this? > > I do. Though given this is lockdep complaining about what looks like > memory corruption, it's probably not related. Ok, could you please try this with some heavy memory pressure? I'm hoping to trigger a use-after-free that points us in the right direction. -chris -- 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/