Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754960Ab2HGO04 (ORCPT ); Tue, 7 Aug 2012 10:26:56 -0400 Received: from mail-qc0-f174.google.com ([209.85.216.174]:56093 "EHLO mail-qc0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754638Ab2HGO0z (ORCPT ); Tue, 7 Aug 2012 10:26:55 -0400 Message-ID: <502125D2.3060809@gmail.com> Date: Tue, 07 Aug 2012 16:27:30 +0200 From: Sasha Levin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120730 Thunderbird/14.0 MIME-Version: 1.0 To: Dave Jones , Ingo Molnar , Peter Zijlstra , Andrew Morton , tglx@linutronix.de, "linux-kernel@vger.kernel.org" , viro@zeniv.linux.org.uk, dhowells@redhat.com, james.l.morris@oracle.com, keyrings@linux-nfs.org Subject: Re: tasklist_lock lockdep warnings on 3.6 References: <500F954B.4010206@gmail.com> <20120802132605.GA27474@redhat.com> <501A8BD0.1000603@gmail.com> In-Reply-To: <501A8BD0.1000603@gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1522 Lines: 41 On 08/02/2012 04:16 PM, Sasha Levin wrote: > On 08/02/2012 03:26 PM, Dave Jones wrote: >> On Mon, Jul 30, 2012 at 04:50:46PM +0200, Sasha Levin wrote: >> > ping? >> > >> > I'm still seeing this on linux-next. >> >> Likewise, except I'm seeing it in Linus' tree since shortly after this merge window >> began. (https://lkml.org/lkml/2012/7/24/443). >> >> I've spent all of this last week doing multiple attempts at bisecting this without success. >> (It doesn't always show up, and even after running the test for over an hour before >> marking a build 'good') >> >> Anyone ? >> >> Dave > > I've been able to hit this issue pretty much every time by hitting sysrq-t after about 10 seconds of fuzzing. It shows up in the middle of the sysrq-t spew. > > Unfortunately I didn't have time yet to try and bisect it. > So I've bisected it. The bisection was automatic most of the time, but I've confirmed that this is indeed the offending commit manually. d35abdb28824cf74f0a106a0f9c6f3ff700a35bf is the first bad commit commit d35abdb28824cf74f0a106a0f9c6f3ff700a35bf Author: Al Viro Date: Sat Jun 30 11:55:24 2012 +0400 hold task_lock around checks in keyctl Signed-off-by: Al Viro Relevant parties Cc'ed. -- 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/