linux-kernel - Re: v3.0: Weird kernel log message when resuming avout NMI received

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Message-ID: <20110731153225.GJ2209@sun>
Date:	Sun, 31 Jul 2011 19:32:25 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Francis Moreau <francis.moro@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Don Zickus <dzickus@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Stephane Eranian <eranian@...gle.com>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: v3.0: Weird kernel log message when resuming avout NMI received

On Sun, Jul 31, 2011 at 05:20:15PM +0200, Francis Moreau wrote:
> Hi Cyrill
> 
> On Sun, Jul 31, 2011 at 1:06 PM, Cyrill Gorcunov <gorcunov@...il.com> wrote:
> > On Sun, Jul 31, 2011 at 08:56:30AM +0200, Francis Moreau wrote:
> >> Hello,
> >>
> >> I'm seeing those kernel message when resuming:
> >>
> >> [  524.973283] Uhhuh. NMI received for unknown reason 3d on CPU 0.
> >> [  524.973288] Do you have a strange power saving mode enabled?
> >> [  524.973289] Dazed and confused, but trying to continue
> >>
> >> I don't know if it's important or not because the system seems to work
> >> after but maybe it worths to report
> >>
> >
> > Hi Francis, cpu please?
> >
> 
> Still the same which causes some kvm-tools madness ;)
> 

OK, thanks Francis, I've CC'ed a couple of people involved into
x86 perf implementation. I believe at moment of wakeup we could
drop any/all overflow flags in perf registers (still didn't look
into, will try to find some time a bit later).

	Cyrill
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