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

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Date:	Wed, 25 Apr 2007 10:07:59 -0300
From:	Federico Heinz <fheinz@...libre.org.ar>
To:	Pavel Machek <pavel@....cz>
CC:	Ingo Molnar <mingo@...e.hu>, Nick Piggin <npiggin@...e.de>,
	Mike Galbraith <efault@....de>, linux-kernel@...r.kernel.org,
	Con Kolivas <kernel@...ivas.org>,
	suspend2-devel@...ts.suspend2.net,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: suspend2 merge (was Re: [Suspend2-devel] Re: CFS and suspend2:
 hang in atomic copy)

Pavel Machek wrote:
> ..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.
>   

In my experience, the speedup is significant, both in hibernating and in 
waking up, and since the full image is written to disk, the system wakes 
up *usable*. It takes forever for a system that wakes up from uswsusp to 
be usable again, it keeps tripping over page faults for *minutes*.

    Fede

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