From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arjan van de Ven Subject: Re: [patch 3/3] Enable Aggressive Link Power management for AHCI controllers. Date: Mon, 11 Jun 2007 20:59:46 -0700 Message-ID: <466E1A32.90306@linux.intel.com> References: <20070611184146.448266229@intel.com> <20070611114839.907bcae2.kristen.c.accardi@intel.com> <20070612011148.GA9808@khazad-dum.debian.net> <466DF3E9.30303@linux.intel.com> <466DFE09.3020408@garzik.org> <20070612035928.GB9808@khazad-dum.debian.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mga06.intel.com ([134.134.136.21]:37419 "EHLO orsmga101.jf.intel.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750698AbXFLEBU (ORCPT ); Tue, 12 Jun 2007 00:01:20 -0400 In-Reply-To: <20070612035928.GB9808@khazad-dum.debian.net> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Henrique de Moraes Holschuh Cc: Jeff Garzik , =?ISO-8859-1?Q?Dagfinn_Ilmari_Mann?= =?ISO-8859-1?Q?s=E5ker?= , Kristen Carlson Accardi , james.bottomley@steeleye.com, linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, htejun@gmail.com Henrique de Moraes Holschuh wrote: > On Mon, 11 Jun 2007, Jeff Garzik wrote: >>>> on/off doesn't really make sense if the question is "do you favor power >>>> or do you favor performance"....... > > Actually, it does if you think of it as "do you need hotplug right now or > not?". that's a temporary shortcoming; even with these power savings you can do hotplug as long as you're willing to poll for it at a reasonable interval and are willing to wait the time between polls for a hotplug to take effect..