From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758523AbZAMMeq (ORCPT ); Tue, 13 Jan 2009 07:34:46 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753531AbZAMMeh (ORCPT ); Tue, 13 Jan 2009 07:34:37 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:46980 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753214AbZAMMeg (ORCPT ); Tue, 13 Jan 2009 07:34:36 -0500 Date: Tue, 13 Jan 2009 13:34:25 +0100 From: Ingo Molnar To: Michal Hocko Cc: LKML , Nick Piggin , Peter Zijlstra Subject: Re: WARNING: at kernel/sched.c:4440 sub_preempt_count+0x81/0x95() Message-ID: <20090113123425.GB29926@elte.hu> References: <20090113122455.GA24824@dhcp35.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090113122455.GA24824@dhcp35.suse.cz> 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 * Michal Hocko wrote: > Hi, > I am not sure whether someone has already reported this, but > I can see the following early boot WARNING with the 2.6.29-rc1 kernel in > the serial console output: > > ------------[ cut here ]------------ > WARNING: at kernel/sched.c:4440 sub_preempt_count+0x81/0x95() That one should be fixed in tip/master and it is in the to-Linus queue of fixes: http://people.redhat.com/mingo/tip.git/README it's this commit: 01e3eb8: Revert "sched: improve preempt debugging" if you want to cherry-pick the fix. Ingo