From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailhub.sw.ru ([195.214.233.200]:16754 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752927AbXLJQgr (ORCPT ); Mon, 10 Dec 2007 11:36:47 -0500 Message-ID: <475D6C6D.5010903@sw.ru> Date: Mon, 10 Dec 2007 19:42:21 +0300 From: Kirill Korotaev MIME-Version: 1.0 Subject: Re: [PATCH][RFC] freezer : add the TIF_FREEZE flag to all archs References: <47594F8C.7070900@fr.ibm.com> <200712101736.29676.rjw@sisk.pl> In-Reply-To: <200712101736.29676.rjw@sisk.pl> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-arch-owner@vger.kernel.org List-ID: To: "Rafael J. Wysocki" Cc: Cedric Le Goater , linux-arch@vger.kernel.org, Linux Containers , linux-pm@lists.linux-foundation.org >>From: Cedric Le Goater > > > Sorry for the delay, I somehow managed to overlook your message. > > >>This patch is the first step in making the refrigerator() available >>to all architectures, even for those without power management. >> >>The purpose of such a change is to be able to use the refrigerator() >>in a new control group subsystem which will implement a control group >>freezer. > > > Hm, sounds interesting, but ... > > >>If you think this is safe and not utterly stupid, I'll send the rest >>of the patchset exporting the refrigerator to all arches. > > > ... you will need to provide some details, I think. > > I also think that it's safe to define TIF_FREEZE for all architectures, but > the usefulness of it will very much depend on the purpose. :-) refrigerator() can be used (and is actually used in OpenVZ containers) to freeze container processes for checkpointing (live migration). So this can be used regardless system suspend and on all archs. Thanks, Kirill