From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760970AbXGDLD2 (ORCPT ); Wed, 4 Jul 2007 07:03:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757577AbXGDLDB (ORCPT ); Wed, 4 Jul 2007 07:03:01 -0400 Received: from smtp-out001.kontent.com ([81.88.40.215]:33495 "EHLO smtp-out.kontent.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757518AbXGDLDA (ORCPT ); Wed, 4 Jul 2007 07:03:00 -0400 From: Oliver Neukum To: Paul Mackerras Subject: Re: [linux-pm] Re: [PATCH] Remove process freezer from suspend to RAM pathway Date: Wed, 4 Jul 2007 13:02:58 +0200 User-Agent: KMail/1.9.7 Cc: linux-pm@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Matthew Garrett References: <20070703042916.GA17240@srcf.ucam.org> <200707041253.33154.oliver@neukum.org> <18059.32169.906914.258802@cargo.ozlabs.ibm.com> In-Reply-To: <18059.32169.906914.258802@cargo.ozlabs.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200707041303.00016.oliver@neukum.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Am Mittwoch, 4. Juli 2007 schrieb Paul Mackerras: > Oliver Neukum writes: > > > They can't. Device specific protocols are known to the drivers only. > > The fact remains, remove the freezer and you need to go through > > all drivers. > > The freezer does not actually mean that you don't have to get the > drivers right, because kernel threads can issue I/O requests. Kernel threads do not issue requests for the hell of it. And yes, kernel threads must be aware of suspension. Threads are few, drivers many. Oliver