linux-kernel - Re: WARNING: at kernel/sched.c:4440 sub_preempt

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Message-ID: <20090113132117.GA5571@dhcp35.suse.cz>
Date:	Tue, 13 Jan 2009 14:21:17 +0100
From:	Michal Hocko <mhocko@...e.cz>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: WARNING: at kernel/sched.c:4440 sub_preempt_count+0x81/0x95()

On Tue 13-01-09 13:34:25, Ingo Molnar wrote:
> 
> * Michal Hocko <mhocko@...e.cz> 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.

Thanks that fixes the issue on my end.

> 
> 	Ingo

-- 
Michal Hocko
L3 team 
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9    
Czech Republic
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