From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757667AbYCUNUW (ORCPT ); Fri, 21 Mar 2008 09:20:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755455AbYCUNUH (ORCPT ); Fri, 21 Mar 2008 09:20:07 -0400 Received: from smtp-out003.kontent.com ([81.88.40.217]:39135 "EHLO smtp-out003.kontent.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755374AbYCUNUG convert rfc822-to-8bit (ORCPT ); Fri, 21 Mar 2008 09:20:06 -0400 X-Greylist: delayed 741 seconds by postgrey-1.27 at vger.kernel.org; Fri, 21 Mar 2008 09:20:06 EDT From: Oliver Neukum Organization: Novell To: linux-pm@lists.linux-foundation.org Subject: Re: [linux-pm] [ugly patch] Save .15W-.5W by AHCI powersaving Date: Fri, 21 Mar 2008 08:49:56 +0100 User-Agent: KMail/1.9.6 (enterprise 20070904.708012) Cc: Jeff Garzik , Mark Lord , Linux-pm mailing list , kernel list , linux-ide@vger.kernel.org References: <20080225134558.GA1611@elf.ucw.cz> <47C34081.5090205@rtr.ca> <47C34472.3090706@garzik.org> In-Reply-To: <47C34472.3090706@garzik.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8BIT Content-Disposition: inline Message-Id: <200803210849.58035.oliver@neukum.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am Montag, 25. Februar 2008 23:42:58 schrieb Jeff Garzik: > > This is cool enough that we really ought to do a hardware-independent > > version, so that all SATA interfaces could benefit.  Especially ata_piix, > > but others too. > > BTW we can also save power by allowing the user to choose to disable > hotplugging support.  Then we can power down PHYs that are not in use. Can't we power them up periodically to check for new hardware? Regards Oliver