Messages in this thread | | | From | "Rafael J. Wysocki" <> | 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 |
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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
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