linux-kernel - Re: x86-tip.today: flood of WARNING: at include/linux/sched.h:2238 run_posix_cpu

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Message-ID: <20090211125340.GK16535@elte.hu>
Date:	Wed, 11 Feb 2009 13:53:40 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Mike Galbraith <efault@....de>, Oleg Nesterov <oleg@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: x86-tip.today: flood of WARNING: at include/linux/sched.h:2238
	run_posix_cpu_timers+0xea/0x79f()


* Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:

> On Fri, 2009-02-06 at 15:01 +0100, Ingo Molnar wrote:
> > * Mike Galbraith <efault@....de> wrote:
> > 
> > > Greetings,
> > > 
> > > Futzing with kerneltop this morning, I fired up amarok to give it
> > > something light to monitor while I hunt missing events.  Something bad
> > > happened, and when I finally (SysRq-E took minutes) got control of box
> > > back, dmesg was full of a steady stream of the below.
> > > 
> > > That warning can be kinda unfriendly.
> > > 
> > > 
> > > [ 9964.600004] ------------[ cut here ]------------
> > > [ 9964.600006] WARNING: at include/linux/sched.h:2238 run_posix_cpu_timers+0xea/0x79f()
> > 
> > ah, that's Peter's stuff:
> > 
> >  4cd4c1b: timers: split process wide cpu clocks/timers
> >  32bd671: signal: re-add dead task accumulation stats.
> > 
> > The discussion with Oleg resulted in the conclusion i 
> > think that the warning is spurious and should be removed.
> > 
> > I've commited the minimal fix below to tip:master. There's
> > more fixes needed too but this should solve the warning
> > flood at least.
> 
> I think this is the 'minimal' paranoia version.

applied to tip:timers/urgent, thanks Peter!

	Ingo
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