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

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Message-ID: <87hbxfxgct.fsf@old-tantale.fifi.org>
Date:	14 Jul 2009 11:35:30 -0700
From:	Philippe Troin <phil@...i.org>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	john stultz <johnstul@...ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: Re: Clock incorrect on 2.6.31-rc2

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.

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

Phil.
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