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Date:	Sun, 01 Mar 2009 21:13:33 +0100
From:	Jesper Krogh <>
To:	john stultz <>
CC:	Thomas Gleixner <>,
	Linus Torvalds <>,
	Linux Kernel Mailing List <>,
	Len Brown <>
Subject: Re: Linux 2.6.29-rc6

john stultz wrote:
>> Working (clocksource=tsc)
>> jk@...d03:~$ ntpdc -c kerninfo
>> pll offset:           0.003208 s
>> pll frequency:        -25.070 ppm
> [snip]
>> Non-working (clocksource=tsc) 2.6.29-rc6
>> jk@...d12:~$ ntpdc -c kerninfo
>> pll offset:           0 s
>> pll frequency:        -34.754 ppm
> Ok, so it seems ntp hasn't really had a chance to settle down, its only
> made a 10ppm adjustment so far. NTPd will stop corrections at ~
> +/-500ppm, so you're not at that bound yet, where things would be really
> broken.

But I should settle within a "reasonable" period of time? (not hours?).

> If the affected kernel isn't resetting in the logs anymore, I'd be
> interested in what the new ppm value is.

I keeps resetting after 7 hours ..   Is there more information I can 


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