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

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Message-ID: <20090113123425.GB29926@elte.hu>
Date:	Tue, 13 Jan 2009 13:34:25 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Michal Hocko <mhocko@...e.cz>
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()


* 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.

	Ingo
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