linux-kernel - Re: [-mm PATCH 1/9] Memory controller resource counters (v6)

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Message-ID: <46E7B9DA.6070404@linux.vnet.ibm.com>
Date:	Wed, 12 Sep 2007 15:35:14 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Paul Menage <menage@...gle.com>
CC:	Nick Piggin <npiggin@...e.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	YAMAMOTO Takashi <yamamoto@...inux.co.jp>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux MM Mailing List <linux-mm@...ck.org>,
	Eric W Biederman <ebiederm@...ssion.com>,
	Linux Containers <containers@...ts.osdl.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Pavel Emelianov <xemul@...nvz.org>
Subject: Re: [-mm PATCH 1/9] Memory controller resource counters (v6)

Paul Menage wrote:
> Hi Balbir/Pavel,
> 
> As I mentioned to you directly at the kernel summit, I think it might
> be cleaner to integrate resource counters more closely with control
> groups. So rather than controllers such as the memory controller
> having to create their own boilerplate cf_type structures and
> read/write functions, it should be possible to just call a function
> something like
> 
> control_group_add_rescounter(struct cgroup *cg, struct cgroup_subsys *ss,
>                                              struct res_counter *res,
> const char *name)
> 
> and have it handle all the userspace API. This would simplify the task
> of keeping a consistent userspace API between different controllers
> using the resource counter abstraction.
> 
> Paul
> 

Yes, I remember discussing it with you. I would expect res_counters
definition to be dynamic (to be able to add the guarantee, soft limit,
etc) for expansion in the future. In the future, I would also like
to do hierarchical resource groups, the hierarchy would represent
the current filesystem hierarchy.

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL
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