linux-kernel - Re: [ckrm-tech] [RFC] Resource Management

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Message-ID: <454853B2.8020604@openvz.org>
Date:	Wed, 01 Nov 2006 10:58:42 +0300
From:	Pavel Emelianov <xemul@...nvz.org>
To:	Paul Menage <menage@...gle.com>
CC:	Pavel Emelianov <xemul@...nvz.org>, dev@...nvz.org,
	vatsa@...ibm.com, sekharan@...ibm.com,
	ckrm-tech@...ts.sourceforge.net, balbir@...ibm.com,
	haveblue@...ibm.com, linux-kernel@...r.kernel.org, pj@....com,
	matthltc@...ibm.com, dipankar@...ibm.com, rohitseth@...gle.com,
	devel@...nvz.org
Subject: Re: [ckrm-tech] [RFC] Resource Management - Infrastructure choices

Paul Menage wrote:
> On 10/31/06, Pavel Emelianov <xemul@...nvz.org> wrote:
>>
>> That's functionality user may want. I agree that some users
>> may want to create some kind of "persistent" beancounters, but
>> this must not be the only way to control them. I like the way
>> TUN devices are done. Each has TUN_PERSIST flag controlling
>> whether or not to destroy device right on closing. I think that
>> we may have something similar - a flag BC_PERSISTENT to keep
>> beancounters with zero refcounter in memory to reuse them.
> 
> How about the cpusets approach, where once a cpuset has no children
> and no processes, a usermode helper can be executed - this could

Hmm... Sounds good. I'll think over this.

> immediately remove the container/bean-counter if that's what the user
> wants. My generic containers patch copies this from cpusets.
> 
>>
>> Moreover, I hope you agree that beancounters can't be made as
>> module. If so user will have to built-in configfs, and thus
>> CONFIG_CONFIGFS_FS essentially becomes "bool", not a "tristate".
> 
> How about a small custom filesystem as part of the containers support,
> then? I'm not wedded to using configfs itself, but I do think that a
> filesystem interface is much more debuggable and extensible than a
> system call interface, and the simple filesystem is only a couple of
> hundred lines.

This sounds more reasonable than using configfs for me.

> Paul
> 

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