Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753966Ab3ISNC4 (ORCPT ); Thu, 19 Sep 2013 09:02:56 -0400 Received: from mail-vc0-f177.google.com ([209.85.220.177]:46151 "EHLO mail-vc0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753810Ab3ISNCz (ORCPT ); Thu, 19 Sep 2013 09:02:55 -0400 Date: Thu, 19 Sep 2013 09:10:07 -0400 (EDT) From: Vince Weaver To: Andi Kleen cc: Vince Weaver , linux-kernel@vger.kernel.org, Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Dave Jones Subject: Re: perf-related lockup on 3.11 In-Reply-To: <8761tx5ie2.fsf@tassilo.jf.intel.com> Message-ID: References: <8761tx5ie2.fsf@tassilo.jf.intel.com> User-Agent: Alpine 2.10 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1392 Lines: 35 On Thu, 19 Sep 2013, Andi Kleen wrote: > Vince Weaver writes: > > > On Wed, 11 Sep 2013, Vince Weaver wrote: > > > >> > >> I got this hard lockup running my perf_fuzzer on 3.11 on a core2. > >> I guess I should try to reproduce it on linus-git but was hoping > >> I could wait until -rc1 before trying that. > > > > OK, I can also lock up 3.12-rc1 using the perf_fuzzer. Last message > > logged is below. > > If it's easily reproducible and a regression, could you perhaps bisect it? It's not necessarily easy to reproduce. It shows up eventually, but it varies a bit. It's also unclear whether it is a regression or not. It only started appearing because I already got fixed the 5 or so other bugs that the fuzzer would trigger first. So bisecting will be a pain because older kernels would have to be patched and the patches don't necessarily apply cleanly further back. I'm working on seeing if I can get a reproducible trace that I can work with, but there's a lot of other stuff going on right now so it's semi low priority until I can spare a machine from doing 3.12-rc1 validation tests. Vince -- 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/