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

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Message-ID: <alpine.LFD.1.00.0802130845380.12988@apollo.tec.linutronix.de>
Date:	Wed, 13 Feb 2008 09:21:28 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Frans Pop <elendil@...net.nl>, linux-kernel@...r.kernel.org,
	john stultz <johnstul@...ibm.com>
Subject: Re: [stable 2.6.24] WARNING: at kernel/time/clockevents.c

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

Frans, Thanks for reporting !

I'm working on a fix.

Thanks,

	tglx
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