From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933274Ab0E0WKH (ORCPT ); Thu, 27 May 2010 18:10:07 -0400 Received: from cavan.codon.org.uk ([93.93.128.6]:38405 "EHLO cavan.codon.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932788Ab0E0WKC (ORCPT ); Thu, 27 May 2010 18:10:02 -0400 Date: Thu, 27 May 2010 23:09:49 +0100 From: Matthew Garrett To: Alan Cox 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: <20100527220949.GB10602@srcf.ucam.org> References: <20100527222514.0a1710bf@lxorguk.ukuu.org.uk> <20100527230806.4deb6de3@lxorguk.ukuu.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20100527230806.4deb6de3@lxorguk.ukuu.org.uk> User-Agent: Mutt/1.5.18 (2008-05-17) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: mjg59@cavan.codon.org.uk X-SA-Exim-Scanned: No (on cavan.codon.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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? -- Matthew Garrett | mjg59@srcf.ucam.org