Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754217AbZAENG4 (ORCPT ); Mon, 5 Jan 2009 08:06:56 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751280AbZAENGr (ORCPT ); Mon, 5 Jan 2009 08:06:47 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:55584 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751156AbZAENGq (ORCPT ); Mon, 5 Jan 2009 08:06:46 -0500 Date: Mon, 5 Jan 2009 14:06:38 +0100 From: Ingo Molnar To: Vaidyanathan Srinivasan Cc: Peter Zijlstra , Linux Kernel , Balbir Singh , Andrew Morton , Mike Galbraith Subject: Re: [BUG] 2.6.28-git LOCKDEP: Possible recursive rq->lock Message-ID: <20090105130638.GB6014@elte.hu> References: <20090104174450.GB4301@dirshya.in.ibm.com> <1231092523.29980.4.camel@twins> <20090105040635.GF4301@dirshya.in.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090105040635.GF4301@dirshya.in.ibm.com> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1314 Lines: 38 * Vaidyanathan Srinivasan wrote: > * Peter Zijlstra [2009-01-04 19:08:43]: > > > On Sun, 2009-01-04 at 23:14 +0530, Vaidyanathan Srinivasan wrote: > > > Hi Ingo, > > > > > > Kernbench runs on latest Linux git tree stalled with the following > > > lockdep warning. > > > > > > Lockdep warning and lockup on Jan 3 Linus git tree > > > commit 7d3b56ba37a95f1f370f50258ed3954c304c524b > > > > > > kernbench run with two threads stalled. sched_mc was zero. > > > x86_64 system with 8 logical CPUs in dual socket quad core > > > configuration. > > > > > > I will post more information as I debug this warning/bug. > > > > Its ca109491f612aab5c8152207631c0444f63da97f, I've some ideas on how to > > fix this, just haven't gotten around to actually doing anything -- > > seeing how it was holidays and such.. > > Hi Peter, > > I can definitely test your fix when you have them. I have an > autotest job that hits this bug. could you check latest tip/master, it has Peter's and Thomas's hrtimer fixes. Ingo -- 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/