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

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Message-ID: <qlG9V8pP.1177603830.8836760.penberg@cs.helsinki.fi>
Date:	Thu, 26 Apr 2007 19:10:30 +0300 (EEST)
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	rjw@...k.pl
CC:	"Pavel Machek" <pavel@....cz>,
	"Dumitru Ciobarcianu" <Dumitru.Ciobarcianu@...s.ro>,
	"Ingo Molnar" <mingo@...e.hu>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Nigel Cunningham" <nigel@...el.suspend2.net>,
	"Christian Hesse" <mail@...thworm.de>,
	"Nick Piggin" <npiggin@...e.de>, "Mike Galbraith" <efault@....de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Con Kolivas" <kernel@...ivas.org>,
	"suspend2-devel@...ts.suspend2.net" 
	<suspend2-devel@...ts.suspend2.net>,
	"Andrew Morton" <akpm@...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)


On 4/26/2007, "Rafael J. Wysocki" <rjw@...k.pl> wrote:
> In principle, we could add suspend2 as an alternative (in analogy with the I/O
> schedulers, for example), but I think for this purpose it should be reviewed
> properly.

Yeah, this makes sense.

On 4/26/2007, "Rafael J. Wysocki" <rjw@...k.pl> wrote:
> There also is a real problem with how it uses the LRU pages.  It _seems_ to
> work, but at least to me it seems to be potentially dangerous.

I am new to suspend2 so can you please explain what exactly is dangerous
about it?

                                     Pekka
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