From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1423787AbWKFK2l (ORCPT ); Mon, 6 Nov 2006 05:28:41 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1423788AbWKFK2l (ORCPT ); Mon, 6 Nov 2006 05:28:41 -0500 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:54425 "EHLO amd.ucw.cz") by vger.kernel.org with ESMTP id S1423778AbWKFK2j (ORCPT ); Mon, 6 Nov 2006 05:28:39 -0500 Date: Mon, 6 Nov 2006 11:28:18 +0100 From: Pavel Machek To: Neil Brown Cc: "Rafael J. Wysocki" , LKML , linux-raid@vger.kernel.org Subject: Re: [RFC][PATCH -mm][Experimental] suspend: Do not freeze md_threads Message-ID: <20061106102818.GA3138@elf.ucw.cz> References: <200611022355.52856.rjw@sisk.pl> <20061105115804.GG4965@elf.ucw.cz> <17742.26007.249504.79631@cse.unsw.edu.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <17742.26007.249504.79631@cse.unsw.edu.au> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.11+cvs20060126 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi! > > > If there's a swap file on a software RAID, it should be possible to use this > > > file for saving the swsusp's suspend image. Also, this file should be > > > available to the memory management subsystem when memory is being freed before > > > the suspend image is created. > > > > > > For the above reasons it seems that md_threads should not be frozen during > > > the suspend and the appended patch makes this happen, but then there is the > > > question if they don't cause any data to be written to disks after the > > > suspend image has been created, provided that all filesystems are frozen > > > at that time. > > > > Looks okay to me. It would be nice to have someone (Ingo? Neil?) try > > to suspend to swap on md...... > > Yes... suspending to swap-on-md would probably be fairly easy. > Resuming from that same swap might be a bit more of a challenge. > If only I had more time... With uswsusp (scheduled for 10.2), it should be fairly easy, too. I guess we shall just get Andrea to try it :-). Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html