linux-kernel - Re: [RFC, PATCH 0/5] Going forward with Resource Management

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Message-ID: <44D35F0B.5000801@sw.ru>
Date:	Fri, 04 Aug 2006 18:51:55 +0400
From:	Kirill Korotaev <dev@...ru>
To:	vatsa@...ibm.com
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>, Andrew Morton <akpm@...l.org>,
	mingo@...e.hu, nickpiggin@...oo.com.au, sam@...ain.net,
	linux-kernel@...r.kernel.org, dev@...nvz.org, efault@....de,
	balbir@...ibm.com, sekharan@...ibm.com, nagar@...son.ibm.com,
	haveblue@...ibm.com, pj@....com
Subject: Re: [RFC, PATCH 0/5] Going forward with Resource Management - A cpu
 controller

>>I think the risk is that OpenVZ has all the controls and resource
>>managers we need, while CKRM is still more research-ish. I find the
>>OpenVZ code much clearer, cleaner and complete at the moment, although
>>also much more conservative in its approach to solving problems.
> 
> 
> I think it would be nice to compare first the features provided by ckrm and 
> openvz at some point and agree upon the minimum common features we need to have 
> as we go forward. For instance I think Openvz assumes that tasks do
> not need to move between containers (task-groups), whereas ckrm provides this
> flexibility for workload management. This may have some effect on the 
> controller/interface design, no?
OpenVZ assumes that tasks can't move between task-groups for a single reason:
user shouldn't be able to escape from the container.
But this have no implication on the design/implementation.

BTW, do you see any practical use cases for tasks jumping between resource-containers?

Kirill

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