From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751677AbXD2BFh (ORCPT ); Sat, 28 Apr 2007 21:05:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751943AbXD2BFh (ORCPT ); Sat, 28 Apr 2007 21:05:37 -0400 Received: from cavan.codon.org.uk ([217.147.92.49]:40336 "EHLO vavatch.codon.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751677AbXD2BFf (ORCPT ); Sat, 28 Apr 2007 21:05:35 -0400 Date: Sun, 29 Apr 2007 02:04:29 +0100 From: Matthew Garrett To: David Lang Cc: Bill Davidsen , Linus Torvalds , Josh Triplett , Pavel Machek , linux-kernel@vger.kernel.org Message-ID: <20070429010428.GA8117@srcf.ucam.org> References: <4630DF19.3060805@kernel.org> <46339E0C.4070109@tmr.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.12-2006-07-14 X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: mjg59@codon.org.uk Subject: Re: suspend2 merge (was Re: [Suspend2-devel] Re: CFS and suspend2: hang in atomic copy) X-SA-Exim-Version: 4.2.1 (built Tue, 20 Jun 2006 01:35:45 +0000) X-SA-Exim-Scanned: Yes (on vavatch.codon.org.uk) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Apr 28, 2007 at 12:15:50PM -0700, David Lang wrote: > with dynaticks now in the kernel it may even be possible to have the idle > process decide that the next event is far enough away that it should > suspend-to-ram until that point. This would be ideal (and it's broadly what the OLPC guys are aiming for, I think), but on most platforms you're looking at at least a second or so to resume. As far as I know, we're still looking at ~60 ticks a second at best for an average desktop, so that's not going to be a win. -- Matthew Garrett | mjg59@srcf.ucam.org