From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755522Ab0EGRUz (ORCPT ); Fri, 7 May 2010 13:20:55 -0400 Received: from fifo99.com ([67.223.236.141]:37896 "EHLO fifo99.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753386Ab0EGRUx (ORCPT ); Fri, 7 May 2010 13:20:53 -0400 Subject: Re: [linux-pm] [PATCH 1/8] PM: Add suspend block api. From: Daniel Walker To: Tony Lindgren Cc: Matthew Garrett , Brian Swetland , Alan Stern , mark gross , markgross@thegnar.org, Len Brown , linux-doc@vger.kernel.org, Kernel development list , Jesse Barnes , Oleg Nesterov , Tejun Heo , Linux-pm mailing list , Wu Fengguang , Andrew Morton In-Reply-To: <20100507020057.GG30928@atomide.com> References: <20100505234755.GI29604@atomide.com> <20100506134015.GA23426@srcf.ucam.org> <20100506170151.GA30928@atomide.com> <20100506170956.GA28104@srcf.ucam.org> <20100506171453.GC30928@atomide.com> <1273167311.20494.13.camel@c-dwalke-linux.qualcomm.com> <20100506183605.GF30928@atomide.com> <1273173110.20494.19.camel@c-dwalke-linux.qualcomm.com> <20100507020057.GG30928@atomide.com> Content-Type: text/plain; charset="UTF-8" Date: Fri, 07 May 2010 10:20:37 -0700 Message-ID: <1273252837.3542.30.camel@c-dwalke-linux.qualcomm.com> Mime-Version: 1.0 X-Mailer: Evolution 2.28.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2010-05-06 at 19:00 -0700, Tony Lindgren wrote: > Oh some SoC devices like omap hit retention or off modes in the idle loop. > That brings down the idle consumption of a running system to minimal > levels. It's basically the same as suspending the device in every idle loop. > > The system wakes up every few seconds or so, but that already provides > battery life of over ten days or so on an idle system. Of course the > wakeup latencies are in milliseconds then. MSM doesn't have those power states unfortunately .. Your kind of suggesting what I was suggesting in that we should suspend in idle. Your hardware can do it easier tho since your have power states that are equal to suspend. Daniel