Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1765573AbXFRU3T (ORCPT ); Mon, 18 Jun 2007 16:29:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1763626AbXFRU3M (ORCPT ); Mon, 18 Jun 2007 16:29:12 -0400 Received: from mx1.redhat.com ([66.187.233.31]:32924 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763683AbXFRU3L (ORCPT ); Mon, 18 Jun 2007 16:29:11 -0400 Date: Mon, 18 Jun 2007 16:28:49 -0400 From: Dave Jones To: Meelis Roos Cc: Linux Kernel list , davej@codemonkey.org.uk Subject: Re: cpufreq: too long transition latency Message-ID: <20070618202849.GA27690@redhat.com> Mail-Followup-To: Dave Jones , Meelis Roos , Linux Kernel list , davej@codemonkey.org.uk References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.14 (2007-02-12) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 922 Lines: 25 On Mon, Jun 18, 2007 at 11:23:27PM +0300, Meelis Roos wrote: > I have the following messages in my laptops dmesg > > ondemand governor failed to load due to too long transition latency > > and activating ondemand governor fails. This seems to be introduced in > 2.6.22-rc* series - I seem to remember that 2.6.21 was OK but can not > test at the moment. > > Laptop is IBM X20, 440BX chipset, Pentium III (Coppermine). Config and > full dmesg are below. speedstep-ich takes a long time to transition. as ondemand can change speeds frequently, this can cause unacceptable slowdowns, so it prevents itself from being used. Dave -- http://www.codemonkey.org.uk - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/