From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761401AbZAOGz3 (ORCPT ); Thu, 15 Jan 2009 01:55:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755859AbZAOGzU (ORCPT ); Thu, 15 Jan 2009 01:55:20 -0500 Received: from smtp109.mail.mud.yahoo.com ([209.191.85.219]:42051 "HELO smtp109.mail.mud.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1755856AbZAOGzU (ORCPT ); Thu, 15 Jan 2009 01:55:20 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com.au; h=Received:X-YMail-OSG:X-Yahoo-Newman-Property:From:To:Subject:Date:User-Agent:Cc:References:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Content-Disposition:Message-Id; b=lhjruuMYb9pmYSNj6a9M9guXQofeOIx0EBpDeWxKMEffApYwS3VWKfSb5a2QPqKI3xkMtfE9Xv6MlmF1Ig5dyFHtPuc0jSrk9Z/IfcRKmyGTKYbi3QQMn/XkLb4JwKVSIojdBPxLyUrzqkZpdTa6VpwRBKHf6QHn4+gh5sei/mE= ; X-YMail-OSG: b4bOpNwVM1mgTLyXwHUShQu1hkD0YzkdV63oB4KjIYFzi5zzgV00bX6F4zRhkGIieQRewN3qv0VeofkPcRtqKovHVjLfpONLoYGsevDHgH_5Q7huT0eb7wf1RLS9VZQzzulLSh2rjqZn733oXFGX8lIVbM7YhbKSwMz60DZ7cwRTDfOQIYHxk8V2y.BX7WpCxIstdWyrYoLTkw8R86v8vHWEsCg- X-Yahoo-Newman-Property: ymail-3 From: Nick Piggin To: Ingo Molnar Subject: Re: WARNING: at kernel/sched.c:4440 sub_preempt_count+0x81/0x95() Date: Thu, 15 Jan 2009 17:54:57 +1100 User-Agent: KMail/1.9.51 (KDE/4.0.4; ; ) Cc: Michal Hocko , LKML , Peter Zijlstra References: <20090113122455.GA24824@dhcp35.suse.cz> <20090113123425.GB29926@elte.hu> In-Reply-To: <20090113123425.GB29926@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200901151754.58311.nickpiggin@yahoo.com.au> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tuesday 13 January 2009 23:34:25 Ingo Molnar wrote: > * 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. OK, but I still don't think this is the actual problem, but there is something amiss in the init code being exposed by it.