From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dkim2.fusionio.com ([66.114.96.54]:51365 "EHLO dkim2.fusionio.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753766Ab3F0PjA convert rfc822-to-8bit (ORCPT ); Thu, 27 Jun 2013 11:39:00 -0400 Received: from mx2.fusionio.com (unknown [10.101.1.160]) by dkim2.fusionio.com (Postfix) with ESMTP id 65A3F9A0697 for ; Thu, 27 Jun 2013 09:39:00 -0600 (MDT) Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 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> Subject: Re: btrfs triggered lockdep WARN. Date: Thu, 27 Jun 2013 11:38:57 -0400 Sender: linux-btrfs-owner@vger.kernel.org List-ID: 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