Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752431Ab0FGV1K (ORCPT ); Mon, 7 Jun 2010 17:27:10 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:35434 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751218Ab0FGV1H (ORCPT ); Mon, 7 Jun 2010 17:27:07 -0400 From: "Rafael J. Wysocki" To: Martin Steigerwald Subject: Re: [TuxOnIce-devel] [linux-pm] [SUSPECTED SPAM] Re: Proposal for a new algorithm for reading & writing a hibernation image. Date: Mon, 7 Jun 2010 23:28:21 +0200 User-Agent: KMail/1.12.4 (Linux/2.6.35-rc1-rjw; KDE/4.3.5; x86_64; ; ) Cc: tuxonice-devel@tuxonice.net, Nigel Cunningham , LKML , pm list , Maxim Levitsky , "TuxOnIce-devel" References: <9rpccea67yy402c975fqru8r.1275576653521@email.android.com> <4C0C843D.6030008@crca.org.au> <201006071507.56259.Martin@lichtvoll.de> In-Reply-To: <201006071507.56259.Martin@lichtvoll.de> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-2" Content-Transfer-Encoding: 7bit Message-Id: <201006072328.21878.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2244 Lines: 62 On Monday 07 June 2010, Martin Steigerwald wrote: > Am Montag 07 Juni 2010 schrieb Nigel Cunningham: > > Hi. > > Hi Nigel and Rafael, hi everyone else involved, > > > On 07/06/10 05:04, Rafael J. Wysocki wrote: > > > On Sunday 06 June 2010, Maxim Levitsky wrote: > > >> On Sun, 2010-06-06 at 15:57 +0200, Rafael J. Wysocki wrote: > > >>> On Sunday 06 June 2010, Maxim Levitsky wrote: > > > ... > > > > > >>> So how TuxOnIce helps here? > > >> > > >> Very simple. > > >> > > >> With swsusp, I can save 750MB (memory) + 250 Vram (vram) > > >> With full memory save I can save (1750 MB of memory) + 250 MB of > > >> vram.... > > > > > > So what about being able to save 1600 MB total instead of the 2 GB > > > (which is what we're talking about in case that's not clear)? Would > > > it be _that_ _much_ worse? > > > > That all depends on what is in the 400MB you discard. > > > > The difference is "Just as if you'd never hibernated" vs something > > closer to "Just as if you'd only just started up". We can't make > > categorical statements because it really does depend upon what you > > discard and what you want to do post-resume - that is, how useful the > > memory you discard would have been. That's always going to vary from > > case to case. > > Nigel and Rafael, how about just testing it? ISTR that can be done to some extent using TuxOnIce as is, becuase there is a knob that you can use to limit the image size. > Whats needed to have 80% of the memory saved instead of 50%? > > I think its important to go the next steps towards a better snapshot in > mainline kernel even when you do not agree on the complete end result yet. > > What about > > - Rafael, you review the async write patches of Nigel. If they are good, > IMHO they should go in as soon as possible. Yes, I'm going to do that. > - Nigel and/or Rafael, you look at whats needed to save 80% instead of 50% > of the memory and develop a patch for it That would be my suggestion as well. Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/