linux-kernel - Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters

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Message-Id: <1156383086.8324.39.camel@galaxy.corp.google.com>
Date:	Wed, 23 Aug 2006 18:31:26 -0700
From:	Rohit Seth <rohitseth@...gle.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	sekharan@...ibm.com, Kirill Korotaev <dev@...ru>,
	Rik van Riel <riel@...hat.com>,
	ckrm-tech@...ts.sourceforge.net,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andi Kleen <ak@...e.de>, Christoph Hellwig <hch@...radead.org>,
	Andrey Savochkin <saw@...ru>, devel@...nvz.org,
	hugh@...itas.com, Ingo Molnar <mingo@...e.hu>,
	Pavel Emelianov <xemul@...nvz.org>
Subject: Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters

On Tue, 2006-08-22 at 11:02 +0100, Alan Cox wrote:
> Ar Llu, 2006-08-21 am 18:45 -0700, ysgrifennodd Rohit Seth:
> > I think as the tasks move around, it becomes very heavy to move all the
> > pages belonging to previous container to a new container.
> 
> Its not a meaningful thing to do. Remember an object may be passed
> around or shared. The simple "creator pays" model avoids all the heavy
> overheads while maintaining the constraints.
> 

I agree, creator pays model will be good for anonymous pages.  (And this
is where page based container will help).

> Its only user space pages that some of this (AS and RSS) become
> interesting as "movable" objects
> 

I think something like for AS, yes.  But for anonymous pages, might want
to leave them back.

-rohit


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