From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756482AbZEWVPs (ORCPT ); Sat, 23 May 2009 17:15:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753672AbZEWVPk (ORCPT ); Sat, 23 May 2009 17:15:40 -0400 Received: from casper.infradead.org ([85.118.1.10]:56596 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753531AbZEWVPj (ORCPT ); Sat, 23 May 2009 17:15:39 -0400 Date: Sat, 23 May 2009 14:08:30 -0700 From: Arjan van de Ven To: Justin Mattock Cc: Linux Kernel Mailing List Subject: Re: running the kernel without hal= how safe with the cpufreq Message-ID: <20090523140830.5bff23c3@infradead.org> In-Reply-To: References: Organization: Intel X-Mailer: Claws Mail 3.7.0 (GTK+ 2.14.7; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 23 May 2009 11:29:29 -0700 Justin Mattock wrote: > I'm in the process of building a system > minus hal(since udev 142 explains itself > in the README), > Anyways I normally just have > "ondemand" compiled as the main > cpufreq module, and have no powermgnt or cpufreq > userspace tool except or was hal. > should I be concerned > without having hal due to things like this in > ps auxZ if you use ondemand you don't need anything else; the defaults are good and in fact very very few people (if anyone) should ever change the tunables (they're more aimed for the ondemand developers). Any application that touches these tunables is basically broken ;) In addition, you should always be safe against hardware breaking, as long as you don't do things like poke chipset registers to disable SMM etc, there is thermal protection build into the system. First it will automatically slow down the CPU (a lot), and if that is not sufficient/fast enough, the system will shut down before it lets itself be damaged. -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org