From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kristen Carlson Accardi Subject: Re: [PATCH] ata: ahci: power off unused ports Date: Tue, 27 May 2008 14:32:02 -0700 Message-ID: <20080527143202.4bab5bf0@appleyard> References: <20080508161008.59361de5@appleyard> <20080527030854.GC7515@mit.edu> Reply-To: kristen.c.accardi@intel.com Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from mga02.intel.com ([134.134.136.20]:24131 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758467AbYE0VlD (ORCPT ); Tue, 27 May 2008 17:41:03 -0400 In-Reply-To: <20080527030854.GC7515@mit.edu> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Theodore Tso Cc: jeff@garzik.org, linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org On Mon, 26 May 2008 23:08:54 -0400 Theodore Tso wrote: > On Thu, May 08, 2008 at 04:10:08PM -0700, Kristen Carlson Accardi wrote: > > power off unused ports > > > > If the port isn't either a drive bay or an external SATA port, do not > > keep the phy powered on if the port is unoccupied. This saves .75 watts > > on most laptops. A module parameter can be used to override this > > behavior and allow the phy's to be powered up regardless of whether it > > has externally accessible SATA ports. > > > > Signed-off-by: Kristen Carlson Accardi > > Hi, > > I'm wondering what's the status of this patch? > > if this has hit a subsystem tree yet? 0.75 watts power savings sounds > really cool, but it doesn't seem to be in Linus's mainline yet. Has > it hit a subsystem tree yet, or is there some issue that still needs > to be resolved before it can go it? > > Thanks, regards, > > - Ted > Hi Ted, As far as I know the patch has gone nowhere. I believe that Jeff wanted something more flexible than the module parameter that I provided to override the BIOS options. I am not working on this, I figured he had a pretty firm idea what he wanted so he was better equipped to write the patch. Kristen