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SubjectRe: [BUG] Something goes wrong with timer statistics.
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From: Ian Kumlien <iank@bredband.net>
Date: Wed, 30 May 2007 00:51:52 +0200

> On tis, 2007-05-29 at 15:44 -0700, David Miller wrote:
> > From: "Michal Piotrowski" <michal.k.k.piotrowski@gmail.com>
> > Date: Wed, 30 May 2007 00:41:46 +0200
> >
> > > On 30/05/07, David Miller <davem@davemloft.net> wrote:
> > > > From: Ian Kumlien <iank@bredband.net>
> > > > Date: Tue, 29 May 2007 23:38:48 +0200
> > > >
> > > > > As the daystar sets, i try to play some with my new would be
> > > > > firewall/server, but since this will be running for quite some time i
> > > > > have been experimenting with powertop to find out what i can do to limit
> > > > > it's power usage.
> > > > >
> > > > > But, if i run powertop for too long or a few times to many... this
> > > > > happens:
> > > > > http://pomac.netswarm.net/pics/kernel_panic.jpg
> > > > >
> > > > > If i don't run powertop, it is rock solid... Compiling for hours,
> > > > > running memtest for hours etc etc...
> > > >
> > > > I see this same exact problem on sparc64.
> > >
> > > Have you tried this patch?
> > > http://lkml.org/lkml/2007/5/29/392
> >
> > Of course, I worked with Thomas on the fix :-)
>
> I dunno if this applies to me, i run a 32 bit userspace...

That patch fixes a problem on 64-bit kernels, regardless of
userspace, when NOHZ is enabled.
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