From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 16 Jun 2001 09:35:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 16 Jun 2001 09:35:22 -0400 Received: from router-100M.swansea.linux.org.uk ([194.168.151.17]:19979 "EHLO the-village.bc.nu") by vger.kernel.org with ESMTP id ; Sat, 16 Jun 2001 09:35:08 -0400 Subject: Re: Changing CPU Speed while running Linux To: pavel@suse.cz (Pavel Machek) Date: Sat, 16 Jun 2001 14:23:33 +0100 (BST) Cc: arjanv@redhat.com (Arjan van de Ven), geg@iitb.fhg.de (Sven Geggus), linux-kernel@vger.kernel.org In-Reply-To: <20010614131220.A36@toy.ucw.cz> from "Pavel Machek" at Jun 14, 2001 01:12:20 PM X-Mailer: ELM [version 2.5 PL3] MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-Id: From: Alan Cox Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > Can you dig that out? I'd like to take a look. > > [Of course, problem is *not* solved: you still have short time when > kernel runs with wrong bogomips.] Not really. WHen you do the speed change on most of these cpus you have to do it with IRQs off and with the PCI bridge temporarily disabled as the CPU disconnects from the bus during speed transititions and cannot take part in cache coherency