linux-kernel - Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user memory)

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Date:	Fri, 08 Sep 2006 11:33:00 +0400
From:	Pavel Emelianov <xemul@...nvz.org>
To:	sekharan@...ibm.com
CC:	balbir@...ibm.com, Kirill Korotaev <dev@...ru>,
	Rik van Riel <riel@...hat.com>, Srivatsa <vatsa@...ibm.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	CKRM-Tech <ckrm-tech@...ts.sourceforge.net>,
	Dave Hansen <haveblue@...ibm.com>, Andi Kleen <ak@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@...radead.org>,
	Andrey Savochkin <saw@...ru>,
	Matt Helsley <matthltc@...ibm.com>,
	Hugh Dickins <hugh@...itas.com>,
	Alexey Dobriyan <adobriyan@...l.ru>,
	Oleg Nesterov <oleg@...sign.ru>, devel@...nvz.org
Subject: Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added user
 memory)

Chandra Seetharaman wrote:
> On Thu, 2006-09-07 at 00:47 +0530, Balbir Singh wrote:
>
> <snip>
>> Some not quite so urgent ones - like support for guarantees. I think
>> this can
>
> IMO, guarantee support should be considered to be part of the
> infrastructure. Controller functionalities/implementation will be
> different with/without guarantee support. In other words, adding
> guarantee feature later will cause re-implementations.
I'm afraid we have different understandings of what a "guarantee" is.
Don't we?
Guarantee may be one of

  1. container will be able to touch that number of pages
  2. container will be able to sys_mmap() that number of pages
  3. container will not be killed unless it touches that number of pages
  4. anything else

Let's decide what kind of a guarantee we want.
>> be worked out as we make progress.
>>
>>> I agree with these requirements and lets move into this direction.
>>> But moving so far can't be done without accepting:
>>> 1. core functionality
>>> 2. accounting
>>>
>> Some of the core functionality might be a limiting factor for the requirements.
>> Lets agree on the requirements, I think its a great step forward and then
>> build the core functionality with these requirements in mind.
>>
>>> Thanks,
>>> Kirill
>>>

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