From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932155Ab1BXVdt (ORCPT ); Thu, 24 Feb 2011 16:33:49 -0500 Received: from www.tglx.de ([62.245.132.106]:60515 "EHLO www.tglx.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752361Ab1BXVdr (ORCPT ); Thu, 24 Feb 2011 16:33:47 -0500 Date: Thu, 24 Feb 2011 22:33:03 +0100 (CET) From: Thomas Gleixner To: Peter Zijlstra cc: Alan Cox , Nicolas Pitre , Vincent Guittot , lkml , linux-hotplug@vger.kernel.org, Frederic Weisbecker , Steven Rostedt , amit.kucheria@linaro.org, Rusty Russell , Ingo Molnar Subject: Re: [PATCH V5 2/2] tracing, perf : add cpu hotplug trace events In-Reply-To: <1298582255.5226.843.camel@laptop> Message-ID: References: <1298573197.2428.457.camel@twins> <20110224201124.138311ba@lxorguk.ukuu.org.uk> <1298579452.5226.834.camel@laptop> <20110224210431.7a6bba68@lxorguk.ukuu.org.uk> <1298582255.5226.843.camel@laptop> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 24 Feb 2011, Peter Zijlstra wrote: > On Thu, 2011-02-24 at 22:12 +0100, Thomas Gleixner wrote: > > > If you take down the whole SoC, then it's full S2RAM or some > > equivilant thing. That's a different story and propably requires the > > whole hotplug muck. > > Didn't we, during the whole wakelock trainwreck, that s2ram could be > done from idle as well (for hardware where the whole opportunistic > suspend was sensible to begin with)? Yes, needs some more changes to the whole infrastructure of clocks and power gates, but it's doable. Thanks, tglx