linux-kernel - Re: [ckrm-tech] [RFC][PATCH 3/7] UBC: ub context and inheritance

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Date:	Mon, 21 Aug 2006 14:32:05 +0400
From:	Kirill Korotaev <dev@...ru>
To:	sekharan@...ibm.com
CC:	Rik van Riel <riel@...hat.com>, ckrm-tech@...ts.sourceforge.net,
	Andi Kleen <ak@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@...radead.org>,
	Andrey Savochkin <saw@...ru>,
	Alan Cox <alan@...rguk.ukuu.org.uk>, hugh@...itas.com,
	Ingo Molnar <mingo@...e.hu>, devel@...nvz.org,
	Pavel Emelianov <xemul@...nvz.org>
Subject: Re: [ckrm-tech] [RFC][PATCH 3/7] UBC: ub context and inheritance

Chandra Seetharaman wrote:
> On Wed, 2006-08-16 at 19:38 +0400, Kirill Korotaev wrote:
> 
>>Contains code responsible for setting UB on task,
>>it's inheriting and setting host context in interrupts.
>>
>>Task references three beancounters:
>>  1. exec_ub  current context. all resources are
>>              charged to this beancounter.
>>  2. task_ub  beancounter to which task_struct is
>>              charged itself.
> 
> 
> I do not see why task_ub is needed ? i do not see it being used
> anywhere.
it is used to charge task itself. will be heavily used in next patch set
adding "numproc" UBC parameter.

>>  3. fork_sub beancounter which is inherited by
>>              task's children on fork
> 
> 
>>>From other emails it looks like renaming fork/exec to be real/effective
> will be easier to understand.
there is no "real". exec_ub is effective indeed,
but fork_sub is the one to inherit on fork().

Kirill

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