Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755152AbZI3Tf5 (ORCPT ); Wed, 30 Sep 2009 15:35:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754961AbZI3Tf4 (ORCPT ); Wed, 30 Sep 2009 15:35:56 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:39777 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753076AbZI3Tf4 (ORCPT ); Wed, 30 Sep 2009 15:35:56 -0400 Date: Wed, 30 Sep 2009 21:35:33 +0200 From: Ingo Molnar To: Arjan van de Ven Cc: Linus Torvalds , Eric Dumazet , Martin Schwidefsky , Thomas Gleixner , John Stultz , Linux Kernel Mailing List , Peter Zijlstra Subject: Re: Linux 2.6.32-rc1 Message-ID: <20090930193533.GA16896@elte.hu> References: <4AC060AE.1090401@gmail.com> <20090928191506.40b61793@mschwide.boeblingen.de.ibm.com> <4AC10365.7090802@gmail.com> <4AC2712C.4080901@gmail.com> <20090929232248.735bf4df@infradead.org> <20090930170754.0886ff2e@infradead.org> <20090930193204.GA16350@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090930193204.GA16350@elte.hu> User-Agent: Mutt/1.5.18 (2008-05-17) 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=3.2.5 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0045] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 655 Lines: 20 * Ingo Molnar wrote: > > 4 files changed, 81 insertions(+), 14 deletions(-) > > create mode 100644 arch/x86/lib/cmpxchg8b_emu.S > > The two patches cause hangs on 32-bit, in sched_clock_cpu(). I > attached the hang serial log plus the two patches as i applied them. > > Bug in cmpxchg8b_emu()? ... on this CPU we should be using CMPXCHG8B so cmpxchg8b_emu() shouldnt be called. 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/