From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752649Ab2HXELY (ORCPT ); Fri, 24 Aug 2012 00:11:24 -0400 Received: from cavan.codon.org.uk ([93.93.128.6]:33495 "EHLO cavan.codon.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750912Ab2HXELS (ORCPT ); Fri, 24 Aug 2012 00:11:18 -0400 Date: Fri, 24 Aug 2012 05:11:08 +0100 From: Matthew Garrett To: Arjan van de Ven Cc: Rik van Riel , linux-kernel@vger.kernel.org, "Rafael J. Wysocki" , ShuoX Liu , Boris Ostrovsky , Len Brown , Deepthi Dharwar Subject: Re: [RFC][PATCH 0/3] c-state governor changes Message-ID: <20120824041108.GC3001@srcf.ucam.org> References: <20120823171104.38574add@cuia.bos.redhat.com> <5036A67D.9090904@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5036A67D.9090904@linux.intel.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: mjg59@cavan.codon.org.uk X-SA-Exim-Scanned: No (on cavan.codon.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Aug 23, 2012 at 02:54:05PM -0700, Arjan van de Ven wrote: > On 8/23/2012 2:11 PM, Rik van Riel wrote: > > This patch set is mostly there to kick off a discussion in time > > for Kernel Summit. When running it on my laptop, with acpi_idle, > > I see a promising change in powertop. > > be careful with acpi_idle... that will remove most of the intermediate C states the platform has, > so the policy engine no longer has good things to chose from. Not inherently - intel_idle typically only exports 4 C states, and many ACPI platforms will provide the same number, especially when on battery. -- Matthew Garrett | mjg59@srcf.ucam.org