From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756401AbbKECqK (ORCPT ); Wed, 4 Nov 2015 21:46:10 -0500 Received: from one.firstfloor.org ([193.170.194.197]:50885 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751504AbbKECqJ (ORCPT ); Wed, 4 Nov 2015 21:46:09 -0500 Date: Thu, 5 Nov 2015 03:46:07 +0100 From: Andi Kleen To: "Paul E. McKenney" Cc: Andi Kleen , Peter Zijlstra , Dave Jones , Linux Kernel , Ingo Molnar , Stephane Eranian Subject: Re: perf related lockdep bug Message-ID: <20151105024607.GD3533@two.firstfloor.org> References: <20151104051717.GA6098@codemonkey.org.uk> <20151104102151.GG17308@twins.programming.kicks-ass.net> <20151104102800.GZ11639@twins.programming.kicks-ass.net> <20151104105010.GA11639@twins.programming.kicks-ass.net> <20151104134838.GR29027@linux.vnet.ibm.com> <20151104205836.GZ3533@two.firstfloor.org> <20151105005528.GX29027@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20151105005528.GX29027@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Nov 04, 2015 at 04:55:28PM -0800, Paul E. McKenney wrote: > On Wed, Nov 04, 2015 at 09:58:36PM +0100, Andi Kleen wrote: > > > > I tested my perf stress workload with the patch applied on 4.3, > > unfortunately got a hang again :-/ > > Any diagnostics, sysrq-T output, or whatever? The system was dead in the screen saver, no serial console. I restarted it and may have some more information tomorrow. The previous hangs were usually timeout on smp_call_function, so one CPU disappeared. I'll try the extra hunk you pointed out. -Andi