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From: Sven Geggus <>
Subject: Changing CPU Speed while running Linux
Date: Wed, 13 Jun 2001 14:35:37 +0200	[thread overview]
Message-ID: <> (raw)

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

If so, is there a possibility to tell the Kernel that the clock speed has
been changed by means of a particular Kernel call?

If not, where would I put some code to do this at system boot?

Is /usr/src/linux/arch/i386/boot/setup.S the right place for something like

Thanks for hints


Sven Geggus @ Fraunhofer IITB, Karlsruhe (
Phone: +49 721 6091-422, Fax: +49 721 6091-213
Linux powered DATA aquisition and evaluation, embedded systems,
combustion engine diagnosis

             reply	other threads:[~2001-06-13 12:36 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-06-13 12:35 Sven Geggus [this message]
2001-06-13 13:21 ` Arjan van de Ven
2001-06-14 13:12   ` Pavel Machek
2001-06-16 10:46     ` arjan
2001-06-16 13:23     ` Alan Cox
2001-06-16 13:56       ` Ian Stirling
2001-06-13 13:41 ` Magnus Sandberg
2001-06-13 13:49   ` Dave Jones
2001-06-13 22:23 Dieter Nützel

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