linux-kernel - Re: [RFC] cgroup TODOs

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Message-ID: <20120914194950.GQ17747@google.com>
Date:	Fri, 14 Sep 2012 12:49:50 -0700
From:	Tejun Heo <tj@...nel.org>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	containers@...ts.linux-foundation.org, cgroups@...r.kernel.org,
	linux-kernel@...r.kernel.org, Li Zefan <lizefan@...wei.com>,
	Michal Hocko <mhocko@...e.cz>,
	Glauber Costa <glommer@...allels.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Paul Turner <pjt@...gle.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Thomas Graf <tgraf@...g.ch>, Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Neil Horman <nhorman@...driver.com>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	Serge Hallyn <serge.hallyn@...ntu.com>
Subject: Re: [RFC] cgroup TODOs

On Fri, Sep 14, 2012 at 12:44:39PM -0700, Tejun Heo wrote:
> I think there currently is too much (broken) flexibility and intent to
> remove it.  That doesn't mean that removeing all flexibility is the
> right direction.  It inherently is a balancing act and I think the
> proposed solution is a reasonable tradeoff.  There's important
> difference between causing full overhead by default for all users and
> requiring some overhead when the use case at hand calls for the
> functionality.

That said, if someone can think of a better solution, I'm all ears.
One thing that *has* to be maintained is that it should be able to tag
a resource in such way that its associated controllers are
identifiable regardless of which task is looking at it.

Thanks.

-- 
tejun
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