From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com ([209.132.183.28]:54210 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752411Ab3F0RDV (ORCPT ); Thu, 27 Jun 2013 13:03:21 -0400 Date: Thu, 27 Jun 2013 13:03:12 -0400 From: Dave Jones To: Chris Mason Cc: Linux Kernel , linux-btrfs@vger.kernel.org Subject: Re: btrfs triggered lockdep WARN. Message-ID: <20130627170312.GA17728@redhat.com> References: <20130627145824.GA21540@redhat.com> <20130627150130.14981.39849@localhost.localdomain> <20130627151922.GA1438@redhat.com> <20130627153857.14981.14731@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20130627153857.14981.14731@localhost.localdomain> Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Thu, Jun 27, 2013 at 11:38:57AM -0400, Chris Mason wrote: > > > 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. Have anything in particular in mind ? I tried a make -j on a kernel tree in a loop, but nothing new is shaking out. Dave