linux-kernel - Re: [PATCH] BC: resource beancounters (v2)

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Message-ID: <44EF13BB.9030406@yahoo.com.au>
Date:	Sat, 26 Aug 2006 01:14:03 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Andrew Morton <akpm@...l.org>
CC:	Kirill Korotaev <dev@...ru>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Christoph Hellwig <hch@...radead.org>,
	Pavel Emelianov <xemul@...nvz.org>,
	Andrey Savochkin <saw@...ru>, devel@...nvz.org,
	Rik van Riel <riel@...hat.com>, Andi Kleen <ak@...e.de>,
	Greg KH <greg@...ah.com>, Oleg Nesterov <oleg@...sign.ru>,
	Matt Helsley <matthltc@...ibm.com>,
	Rohit Seth <rohitseth@...gle.com>,
	Chandra Seetharaman <sekharan@...ibm.com>
Subject: Re: [PATCH] BC: resource beancounters (v2)

Andrew Morton wrote:
> On Fri, 25 Aug 2006 15:49:15 +0400
> Kirill Korotaev <dev@...ru> wrote:
> 
> 
>>>We need to go over this work before we can commit to the BC
>>>core.  Last time I looked at the VM accounting patch it
>>>seemed rather unpleasing from a maintainability POV.
>>
>>hmmm... in which regard?
> 
> 
> Little changes all over the MM code which might get accidentally broken.

I still think doing simple accounting per-page would be a better way to
go than trying to pin down all "user allocatable" kernel allocations.
And would require all of about 2 hooks in the page allocator. And would
track *actual* RAM allocated by that container.

Can we continue that discussion (ie. why it isn't good enough). Last I
was told it is not perfect and can be unfair... sounds like it fits the
semantics perfectly ;)

-- 
SUSE Labs, Novell Inc.
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