From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oliver Neukum Subject: Re: [RFC] sleepy linux Date: Thu, 27 Dec 2007 00:15:39 +0100 Message-ID: <200712270015.40165.oliver@neukum.org> References: <20071225230731.GA29030@elf.ucw.cz> <200712262123.37152.oliver@neukum.org> <20071226203258.GE8094@elf.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20071226203258.GE8094@elf.ucw.cz> Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org To: Pavel Machek Cc: kernel list , Linux-pm mailing list , "Rafael J. Wysocki" List-Id: linux-pm@vger.kernel.org Am Mittwoch, 26. Dezember 2007 21:32:58 schrieb Pavel Machek: > On Wed 2007-12-26 21:23:37, Oliver Neukum wrote: > > Am Mittwoch, 26. Dezember 2007 21:17:22 schrieb Pavel Machek: > > > Is there an easy way to tell if all the devices are runtime suspended? > > > > Do you really want to know whether they are suspended or whether they > > could be suspended? > > If they are suspended. > > My plan is: let the drivers autosuspend on their own. If I see all of > them are autosuspended, then it looks like great time to put whole > system into s2ram... Your calculation of cost/benefit will be wrong. A driver will have timeouts based on the cost of a suspend/resume cycle of that device only. You'd have to calculate of keeping the whole system awake against that. Regards Oliver