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Date: Tue, 25 Mar 2003 18:17:05 +0100 (CET)
From: Tim Schmielau <tim@physik3.uni-rostock.de>
To: "Richard B. Johnson" <root@chaos.analogic.com>
cc: Fionn Behrens <fionn@unix-ag.org>, <linux-kernel@vger.kernel.org>
Subject: Re: System time warping around real time problem - please help
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On Tue, 25 Mar 2003, Richard B. Johnson wrote:

> On Tue, 25 Mar 2003, Fionn Behrens wrote:
>
> > I have got an increasingly annoying problem with our fairly new (fall
> > '02) Dual Athlon2k+ Gigabyte 7dpxdw linux system running 2.4.20.
> > The only kernel patch applied is Alan Cox's ptrace patch.
> >
>
[...]
> If this shows time jumping around you have one of either:
>
> (1)	Bad timer channel 0 chip (PIT).
> (2)	Some daemon trying to sync time with another system.
> (3)	You are traveling too close to the speed of light.

(4) Unsync'ed TSCs?

See help text for CONFIG_X86_TSC_DISABLE. Never had this problem
myself, though.

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