Re: suspend2 merge (was Re: [Suspend2-devel] Re: CFS and suspend2:hang in atomic copy)

[Dumitru Ciobarcianu]

On Wed, 2007-04-25 at 07:29 +0000, Pavel Machek wrote:
> > userspace-driven-suspend is already in the kernel, today. So it's not 
> > really "two versions side by side doing the same thing", but more of:
> > 
> >            A B C + D E F G H
> > 
> > where "ABC" is used by the uswsusp code today, and "ABCDEFGH" is used by 
> > suspend2. So any "suspend2 merge" would largely be about adding "DEFGH". 
> 
> Actually, we have 'D H' in kernel, today. It is called swsusp...
> (Encryption, swapFile support and Graphical progress are missing from
> today's kernel.)

Please stop using FUD. 
Graphical progress it's not in the kernel, even with suspend2.

> 
> > My original mail was about the following thing: i tried the suspend2 
> > patch (which just makes "echo disk > /sys/power/state" work as expected, 
> > as long as you give the booting up kernel image an idea about where the 
> 
> ..and it means that 'echo disk > ...' should work w/o suspend2 patch,
> too. (Just try it). You'll miss compression part, but that provides
> only small speedup.

I beg to differ:
  Compressed 904687616 bytes into 418828687 (53 percent compression).

Almost 500mb less to write (did I mention it writes the full image?).
Now imagine the time it takes to write that with those pesky 4200rpm
laptop hdds.

-- 
Cioby

"Mr Linus, how do you debug the kernel, what tools do you use?"
"Ever heard of prinf ?"
(From an presentation at the "Politehnica" University of Bucharest, 1995)

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