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Date: Wed, 25 Apr 2007 10:07:59 -0300
From: Federico Heinz <fheinz@vialibre.org.ar>
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To: Pavel Machek <pavel@ucw.cz>
CC: Ingo Molnar <mingo@elte.hu>, Nick Piggin <npiggin@suse.de>,
       Mike Galbraith <efault@gmx.de>, linux-kernel@vger.kernel.org,
       Con Kolivas <kernel@kolivas.org>, suspend2-devel@lists.suspend2.net,
       Andrew Morton <akpm@linux-foundation.org>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Thomas Gleixner <tglx@linutronix.de>,
       Arjan van de Ven <arjan@infradead.org>
Subject: Re: suspend2 merge (was Re: [Suspend2-devel] Re: CFS and suspend2:
 hang in atomic copy)
References: <20070418211632.GA7610@elte.hu>	<200704182357.28107.mail@earthworm.de>	<20070418220228.GA14536@elte.hu>	<1176947576.5906.21.camel@nigel.suspend2.net>	<20070419070437.GA25211@elte.hu>	<20070424202336.GC16503@elf.ucw.cz>	<alpine.LFD.0.98.0704241327180.9964@woody.linux-foundation.org>	<20070424212408.GD16457@elf.ucw.cz>	<alpine.LFD.0.98.0704241630170.9964@woody.linux-foundation.org>	<20070425064137.GA25247@elte.hu> <20070425072904.GB6866@ucw.cz>
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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