From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753115Ab1G2V5I (ORCPT ); Fri, 29 Jul 2011 17:57:08 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:34860 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752794Ab1G2V5G (ORCPT ); Fri, 29 Jul 2011 17:57:06 -0400 From: "Rafael J. Wysocki" To: Oliver Neukum Subject: Re: [linux-pm] better oopsing when frozen Date: Fri, 29 Jul 2011 23:30:09 +0200 User-Agent: KMail/1.13.6 (Linux/3.0.0+; KDE/4.6.0; x86_64; ; ) Cc: Pavel Machek , linux-pm@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Andrew Morton References: <201107251043.19932.oneukum@suse.de> <201107292309.44877.rjw@sisk.pl> <201107292317.42737.oliver@neukum.org> In-Reply-To: <201107292317.42737.oliver@neukum.org> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201107292330.09797.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Friday, July 29, 2011, Oliver Neukum wrote: > Am Freitag, 29. Juli 2011, 23:09:44 schrieb Rafael J. Wysocki: > > On Friday, July 29, 2011, Oliver Neukum wrote: > > > Am Freitag, 29. Juli 2011, 22:27:54 schrieb Rafael J. Wysocki: > > > > However, there's another problem I didn't think of before. Namely, > > > > we cannot thaw tasks before resuming devices in case we've already > > > > suspended them, because that will defeat the very purpose of the > > > > freezing in the first place. > > > > > > That purpose is already defeated. The machine cannot be deader than dead. > > > > OK, so what exactly is the purpose of the thawing, then? > > We may be lucky enough to get the oops written out to disk. The oops may happen > in a driver rarely used and be late in the sequence. OK, so is there any guarantee that we won't corrupt things this way? Rafael