From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932131AbWDYW0J (ORCPT ); Tue, 25 Apr 2006 18:26:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932175AbWDYW0I (ORCPT ); Tue, 25 Apr 2006 18:26:08 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:21657 "EHLO amd.ucw.cz") by vger.kernel.org with ESMTP id S932131AbWDYW0I (ORCPT ); Tue, 25 Apr 2006 18:26:08 -0400 Date: Wed, 26 Apr 2006 00:25:27 +0200 From: Pavel Machek To: "Rafael J. Wysocki" Cc: Nigel Cunningham , Nick Piggin , Linux PM , LKML Subject: Re: [RFC][PATCH] swsusp: support creating bigger images Message-ID: <20060425222526.GG6379@elf.ucw.cz> References: <200604242355.08111.rjw@sisk.pl> <200604252312.26249.rjw@sisk.pl> <200604260718.42681.nigel@suspend2.net> <200604260021.08888.rjw@sisk.pl> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200604260021.08888.rjw@sisk.pl> 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! > > It does apply to all of the LRU pages. This is what I've been doing for years > > now. The only corner case I've come across is XFS. It still wants to write > > data even when there's nothing to do and it's threads are frozen (IIRC - > > haven't looked at it for a while). I got around that by freezing bdevs when > > freezing processes. > > This means if we freeze bdevs, we'll be able to save all of the LRU pages, > except for the pages mapped by the current task, without copying. I think we > can try to do this, but we'll need a patch to freeze bdevs for this purpose. ;-) ...adding more dependencies to how vm/blockdevs work. I'd say current code is complex enough... Pavel -- Thanks for all the (sleeping) penguins.