linux-kernel - Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters

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Date:	Fri, 25 Aug 2006 15:12:35 +0400
From:	Kirill Korotaev <dev@...ru>
To:	sekharan@...ibm.com
CC:	rohitseth@...gle.com, Rik van Riel <riel@...hat.com>,
	ckrm-tech@...ts.sourceforge.net,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andi Kleen <ak@...e.de>, Christoph Hellwig <hch@...radead.org>,
	Andrey Savochkin <saw@...ru>, devel@...nvz.org,
	hugh@...itas.com, Ingo Molnar <mingo@...e.hu>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Pavel Emelianov <xemul@...nvz.org>
Subject: Re: [ckrm-tech] [RFC][PATCH] UBC: user resource beancounters

Chandra Seetharaman wrote:
> On Thu, 2006-08-24 at 10:27 -0700, Rohit Seth wrote:
> 
> <snip>
> 
>>>What do you mean by "resource management part for non-container world
>>>already exist ?
>>>
>>>It does not. CKRM/Resource Groups is trying to do that, but is not in
>>>Linus's tree.
>>>
>>
>>Please, non-container is the environment that exist today in Linux.
>>Actually cpuset does provide some part of it.  But beyond that no.  
> 
> 
> cpuset provides resource _isolation_, not necessarily resource
> management.
> 
> 
>>But then we are all using different terminology like beancounters,
>>containers, resource groups and now non-containers...
>>
> 
> 
> <snip>
> 
>>>>I'm sure when container support gets in then for the above scenario it
>>>>will read -1 ...
>>>
>>>So, how can one get the list of tasks belonging to a resource group in
>>>that case ?
>>>
>>...and that brings to the starting question...why do you need it?
> 
> 
> Like I said earlier, there is _no_ other way to get the list of tasks
> belonging to a resource group.
> 
> 
>>Commands like ps and top will show appropriate container number for each
>>task.
> 
> 
> There is _no_ container number in the non-container environment (or it
> will be same for _all_ tasks).

Chandra, virtual container number is essentially the same as user id
in non-container environment. UBC were desgined for _users_ first.
Containers were just the first environment which started to use it widely.

And I really disagree when you say that non-container usecase is
a superset of container usecase. I believe it is vice versa, since
in container usecase you have a _full_ environment with root user and need
more resources to be taken into account.

Thanks,
Kirill

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