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Date: Wed, 13 Jun 2001 14:21:37 +0100
From: Arjan van de Ven <arjanv@redhat.com>
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To: Sven Geggus <geg@iitb.fhg.de>, linux-kernel@vger.kernel.org
Subject: Re: Changing CPU Speed while running Linux
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Sven Geggus wrote:
> 
> Hi there,
> 
> on my Elan410 based System it is very easy to change the CPU clock speed by
> means od two outb commands.
> 
> I was wondering, if it does some harm to the Kernel if the CPU is
> reprogrammed using a different CPU clock speed, while the system is up and
> running.

I have a module for the K6 PowerNow which allows you to do

echo 450 > /proc/sys/cpu/0/frequency

and does the right thing wrt udelay / bogomips etc..
I can dig it out if you want.. sounds like this should be a more generic
thing.

Greetings,
  Arjan van de Ven