linux-kernel - Re: [stable 2.6.24] WARNING: at kernel/time/clockevents.c

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Message-Id: <200802130947.10781.elendil@planet.nl>
Date:	Wed, 13 Feb 2008 09:47:10 +0100
From:	Frans Pop <elendil@...net.nl>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, john stultz <johnstul@...ibm.com>
Subject: Re: [stable 2.6.24] WARNING: at kernel/time/clockevents.c

On Wednesday 13 February 2008, Thomas Gleixner wrote:
> On Tue, 12 Feb 2008, Andrew Morton wrote:
> > On Sun, 10 Feb 2008 14:40:21 +0100 Frans Pop <elendil@...net.nl> wrote:
> > the hrtimer code is preparing an invalid ktime_t.  Note that
> > clockevents_program_event() actually fails when this happens - I am
> > surprised that this is not causing observeable userspace problems.
> >
> > The WARN_ON_ONCE() means that you'll only see this warning once per
> > boot. But the actually error could be happening any number of times
> > without being reported.
> >
> > Looks pretty serious?
>
> Yes. It's the same problem, which got fixed with:
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit
>;h=62f0f61e6673e67151a7c8c0f9a09c7ea43fe2b5

OK, so probably glibc performs a unit test during build that asks for a long 
sleep. I guess that makes sense.

Thanks Thomas and Andrew.
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