Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753844AbZG2J7O (ORCPT ); Wed, 29 Jul 2009 05:59:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753750AbZG2J7O (ORCPT ); Wed, 29 Jul 2009 05:59:14 -0400 Received: from bombadil.infradead.org ([18.85.46.34]:33586 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753713AbZG2J7N (ORCPT ); Wed, 29 Jul 2009 05:59:13 -0400 Subject: Re: futexes: Still infinite loop in get_futex_key() in 2.6.31-rc4 From: Peter Zijlstra To: Jens Rosenboom Cc: Sonny Rao , Linux Kernel Mailing List , Ingo Molnar , Thomas Gleixner In-Reply-To: <1248861443.6757.20.camel@fnki-nb00130> References: <1248681637.7279.12.camel@fnki-nb00130> <1248694266.6987.1594.camel@twins> <1248697004.7279.31.camel@fnki-nb00130> <1248697409.6987.1617.camel@twins> <1248698755.7279.47.camel@fnki-nb00130> <1248701812.6987.1637.camel@twins> <1248848568.6757.13.camel@fnki-nb00130> <1248861443.6757.20.camel@fnki-nb00130> Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: Wed, 29 Jul 2009 12:01:50 +0200 Message-Id: <1248861710.6987.3064.camel@twins> Mime-Version: 1.0 X-Mailer: Evolution 2.26.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1054 Lines: 22 On Wed, 2009-07-29 at 11:57 +0200, Jens Rosenboom wrote: > On Wed, 2009-07-29 at 08:22 +0200, Jens Rosenboom wrote: > > On Mon, 2009-07-27 at 15:36 +0200, Peter Zijlstra wrote: > > [...] > > > Bugger.. how easy it is to reproduce? > > > > Okay, my colleague found the right combination of scripts, take the two > > attached, run them both a couple of times in parallel for some hours, > > and get a stuck ps. This happens both on an old 2.6.29.1 I happened to > > still have on one machine as with 2.6.31-rc4. Both of them dual-core > > Opterons as the original one. If you want further tracebacks or other > > information, let me know. > > Forget about null.pl even, just run pees.pl twice and a top to watch it, > has worked for me within less than an hour several times now. Thanks, I'll give it a go.. -- 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/