Re: clocksource change of behavior in 2.6.22 compared to 2.6.20causes massive system clock slowdown

From: john stultz
Date: Tue Jul 10 2007 - 13:28:06 EST


On Tue, 2007-07-10 at 00:29 -0700, Andrew Morton wrote:
> On Mon, 9 Jul 2007 16:27:59 +0200 "Alessandro Suardi" <alessandro.suardi@xxxxxxxxx> wrote:
>
> > My oldish AMD K7-800's clock began falling behind after
> > rebooting from 2.6.20 (and 109 days uptime with a spotless
> > clock) into 2.6.22; time lost is about four minutes each hour.
> >
> > Turns out that 2.6.22 marks my TSC as unstable and starts
> > using PIT instead. Rebooting 2.6.22 with clocksource=tsc
> > gets the original stable system time back.

Alessandro,
Can you send me dmesg output for 2.6.20 and 2.6.22 (without
clocksource=tsc)?

thanks
-john

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