From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932993Ab0E0WRa (ORCPT ); Thu, 27 May 2010 18:17:30 -0400 Received: from earthlight.etchedpixels.co.uk ([81.2.110.250]:36571 "EHLO www.etchedpixels.co.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753285Ab0E0WR3 (ORCPT ); Thu, 27 May 2010 18:17:29 -0400 Date: Thu, 27 May 2010 23:23:57 +0100 From: Alan Cox To: Matthew Garrett Cc: Alan Stern , Thomas Gleixner , Peter Zijlstra , LKML , Florian Mickler , felipe.balbi@nokia.com, Linux OMAP Mailing List , Linux PM Subject: Re: [linux-pm] [PATCH 0/8] Suspend block api (version 8) Message-ID: <20100527232357.6d14fdb2@lxorguk.ukuu.org.uk> In-Reply-To: <20100527220949.GB10602@srcf.ucam.org> References: <20100527222514.0a1710bf@lxorguk.ukuu.org.uk> <20100527230806.4deb6de3@lxorguk.ukuu.org.uk> <20100527220949.GB10602@srcf.ucam.org> X-Mailer: Claws Mail 3.7.5 (GTK+ 2.18.9; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 27 May 2010 23:09:49 +0100 Matthew Garrett wrote: > On Thu, May 27, 2010 at 11:08:06PM +0100, Alan Cox wrote: > > > This is I believe robust (and has been implemented on some non x86 > > boxes). It depends on not forcing running tasks into suspend. That is the > > key. > > We've already established that ACPI systems require us to force running > tasks into suspend. How do we avoid the race in that situation? Android phones do not have ACPI. Embedded platforms do not have ACPI. MID x86 devices do not have ACPI. I would imagine the existing laptops will handle power management limited by the functionality they have available. Just like any other piece of hardware. Alan