linux-kernel - Re: [RFC] cgroup TODOs

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Message-ID: <20120917173024.GC18677@google.com>
Date:	Mon, 17 Sep 2012 10:30:24 -0700
From:	Tejun Heo <tj@...nel.org>
To:	Glauber Costa <glommer@...allels.com>
Cc:	Vivek Goyal <vgoyal@...hat.com>,
	containers@...ts.linux-foundation.org, cgroups@...r.kernel.org,
	linux-kernel@...r.kernel.org, Li Zefan <lizefan@...wei.com>,
	Michal Hocko <mhocko@...e.cz>,
	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 Mon, Sep 17, 2012 at 12:40:28PM +0400, Glauber Costa wrote:
> That is exactly what I proposed in our previous discussions around
> memcg, with files like "available_controllers" , "current_controllers".
> Name chosen to match what other subsystems already do.
> 
> if memcg is not in "available_controllers" for a node, it cannot be seen
> by anyone bellow that level.

Glauber, I was talking about making the switch applicable from the
current level *INSTEAD OF* anyone below the current level, so that we
don't have to apply the same switch on all siblings.  I have no idea
why this is causing so much miscommunication. :(

-- 
tejun
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