linux-kernel - Re: Regression in 2.6.27 caused by commit bfc0f59

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Date:	Mon, 1 Sep 2008 19:49:49 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Larry Finger <Larry.Finger@...inger.net>
cc:	LKML <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Alok Kataria <akataria@...are.com>,
	Michael Buesch <mb@...sch.de>
Subject: Re: Regression in 2.6.27 caused by commit bfc0f59

On Mon, 1 Sep 2008, Larry Finger wrote:

> Thomas Gleixner wrote:
> > 
> > > +Clocksource tsc unstable (delta = 500037272 ns)
> > 
> > > -Clocksource tsc unstable (delta = 83950402 ns)
> > 
> > In both cases the TSC is ahead of the pm_timer, which looks like the
> > pm_timer is behaving strange.
> > 
> > Can you please disable the pm_timer (in the kernel config,
> > unfortunately there is no command line option for that) for a test and
> > provide the relevant output of demsg ?
> 
> I manually deleted CONFIG_X86_PM_TIMER from .config, but it returns silently.
> The only way I see to turn off the pm_timer is to disable power management. Is
> that what I need to do?

The switch depends on CONFIG_EMBEDDED. Just turn that on in "General Setup"

       [*] Configure standard kernel features (for small systems)  --->

Then you get an extra switch in:

 "Powermanagement Options"
 	ACPI (Advanced Configuration and Power Interface) Support  ---> 
		[*]   Power Management Timer Support 

Turn that one off.

Thanks,

	tglx
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