linux-kernel - Re: Clock incorrect on 2.6.31-rc2

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Date:	Wed, 15 Jul 2009 15:57:15 -0700
From:	john stultz <johnstul@...ibm.com>
To:	Philippe Troin <phil@...i.org>
Cc:	Stephen Hemminger <shemminger@...tta.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: Re: Clock incorrect on 2.6.31-rc2

On Tue, 2009-07-14 at 11:35 -0700, Philippe Troin wrote:
> Stephen Hemminger <shemminger@...tta.com> writes:
> 
> > > I'm a little stumped.  Does the problem occur on every reboot? How long
> > > does the box need to be up before you see an issue?  Or does it go away
> > > after a little while?
> > 
> > It seemed to take a while (several hours). I will leave it running overnight
> 
> Interestingly, I am seeing the same problem on two boxes with
> 2.6.2{5,6}.  I haven't checked yet more recent kernels.

I suspect your issue and Stephen's issue are separate. 

> The odd thing was that booting with "nohz=off highres=off" did not
> help, the only cure was to recompile the kernel and disable
> CONFIG_HIGH_RES_TIMERS and CONFIG_NO_HZ.
> 
> This is the thread back then:
> http://marc.info/?t=121563147700003&r=1&w=2

Thomas, did you ever take a look at this? It looks like something's off
w/ hrt.

thanks
-john

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