linux-kernel - Re: Clocksource tsc unstable (delta = -8589361717 ns) in current git

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Message-ID: <20101026181957.GC3658@aftab>
Date:	Tue, 26 Oct 2010 20:19:57 +0200
From:	Borislav Petkov <bp@...64.org>
To:	Markus Trippelsdorf <markus@...ppelsdorf.de>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"hpa@...ux.intel.com" <hpa@...ux.intel.com>,
	Ingo Molnar <mingo@...e.hu>,
	"Herrmann3, Andreas" <Andreas.Herrmann3@....com>,
	John Stultz <johnstul@...ibm.com>
Subject: Re: Clocksource tsc unstable (delta = -8589361717 ns) in current
 git

On Tue, Oct 26, 2010 at 01:56:39PM -0400, Markus Trippelsdorf wrote:
> There is also: acf01734b1747b1ec4be6f159aff579ea5f7f8e2 but I'm not
> sure if this commit is really relevant.

This shouldn't be at fault since your detected core frequency printed
after the TSC PIT calibration looks fine:

Oct 24 10:19:05 arch kernel: Fast TSC calibration using PIT
Oct 24 10:19:05 arch kernel: Detected 3211.206 MHz processor.

The changeset above removes the recalibration which was only required by
very early F10h's (and yours is not).

-- 
Regards/Gruss,
Boris.

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