From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756784AbXFKStm (ORCPT ); Mon, 11 Jun 2007 14:49:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753915AbXFKStc (ORCPT ); Mon, 11 Jun 2007 14:49:32 -0400 Received: from mga09.intel.com ([134.134.136.24]:62647 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753086AbXFKSta (ORCPT ); Mon, 11 Jun 2007 14:49:30 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.16,409,1175497200"; d="scan'208";a="95502683" Date: Mon, 11 Jun 2007 11:46:00 -0700 From: Kristen Carlson Accardi To: jeff@garzik.org, james.bottomley@steeleye.com Cc: linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, htejun@gmail.com, arjan@linux.intel.com Subject: [patch 0/3] AHCI Link Power Management Message-Id: <20070611114600.7fca1c24.kristen.c.accardi@intel.com> X-Mailer: Sylpheed 2.3.1 (GTK+ 2.10.8; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, This series of patches enables Aggressive Link Power Management for AHCI devices, as documented in the AHCI spec. On my laptop (a Lenovo X60), this saves me a full watt of power. On other systems, reported power savings range from .5-1.5 Watts. It has been tested by the kind folks at #powertop with similar results. Please give it a try and let me know what you think. thanks, Kristen --