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

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Date:	Tue, 12 Sep 2006 14:35:45 +0400
From:	Pavel Emelianov <xemul@...nvz.org>
To:	vatsa@...ibm.com, balbir@...ibm.com, sekharan@...ibm.com
CC:	Rik van Riel <riel@...hat.com>,
	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>, devel@...nvz.org,
	Matt Helsley <matthltc@...ibm.com>,
	Hugh Dickins <hugh@...itas.com>,
	Alexey Dobriyan <adobriyan@...l.ru>,
	Kirill Korotaev <dev@...ru>, Oleg Nesterov <oleg@...sign.ru>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [ckrm-tech] [PATCH] BC: resource beancounters (v4) (added	user
 memory)

Srivatsa Vaddagiri wrote:
> On Mon, Sep 11, 2006 at 12:13:59PM +0400, Pavel Emelianov wrote:
>   
>> If I set up 9 groups to have 100Mb limit then I have 100Mb assured (on
>> 1Gb node)
>> for the 10th one exactly. And I do not have to set up any guarantee as
>> it won't affect
>> anything. So what a guarantee parameter is needed for?
>>     
>
> I presume you are talking of hard-limiting each group to 100 MB here. In
> which case, wont the 100MB (reserved for 10th group) be unutilized
> untill 10th group is started (it may never be started for that matter!).
>
> IMO it would be better to go and use that free 100 MB for reclaimable memory
> and give that up when 10th group is started.
>   
Sure. I've talked about the unreclaimable memory.
Sorry, for not specifying it explicitly.
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