Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761351AbYGFRym (ORCPT ); Sun, 6 Jul 2008 13:54:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754888AbYGFRyb (ORCPT ); Sun, 6 Jul 2008 13:54:31 -0400 Received: from eazy.amigager.de ([213.239.192.238]:59632 "EHLO eazy.amigager.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752766AbYGFRya (ORCPT ); Sun, 6 Jul 2008 13:54:30 -0400 X-Greylist: delayed 1949 seconds by postgrey-1.27 at vger.kernel.org; Sun, 06 Jul 2008 13:54:29 EDT Date: Sun, 6 Jul 2008 19:21:59 +0200 From: Tino Keitel To: Felipe Balbi Cc: Kernel development list , linux-acpi@vger.kernel.org Subject: Re: Battery life difference Message-ID: <20080706172159.GA12736@x61> Mail-Followup-To: Felipe Balbi , Kernel development list , linux-acpi@vger.kernel.org References: <31e679430807050617u3fc706fasee9bb43a151c501f@mail.gmail.com> <20080705082352.4b6be669@infradead.org> <31e679430807050844r30ff74fby7e15641573b42d82@mail.gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <31e679430807050844r30ff74fby7e15641573b42d82@mail.gmail.com> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 819 Lines: 25 On Sat, Jul 05, 2008 at 18:44:21 +0300, Felipe Balbi wrote: > Hi, > > On Sat, Jul 5, 2008 at 6:23 PM, Arjan van de Ven wrote: [...] > > Also take a look at > > http://kerneltrap.org/mailarchive/linux-kernel/2008/5/8/1771024 because > > these patches save like 0.75W in our lab. > > cool, is it merged upstream ? If I got this right, at least Linux 2.6.25 allows to control this via "/sys/class/scsi_host/host*/link_power_management_policy". Setting it to "min_power" does the trick. This is also covered by powertop 1.10 and later. Regards, Tino -- 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/