linux-kernel - Re: [PATCH REPOST RFC cgroup/for-3.7] cgroup: mark subsystems with broken hierarchy support and whine if cgroups are nested for them

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Message-ID: <20120914191509.GN17747@google.com>
Date:	Fri, 14 Sep 2012 12:15:09 -0700
From:	Tejun Heo <tj@...nel.org>
To:	Glauber Costa <glommer@...allels.com>
Cc:	Michal Hocko <mhocko@...e.cz>, linux-kernel@...r.kernel.org,
	containers@...ts.linux-foundation.org, cgroups@...r.kernel.org,
	Li Zefan <lizefan@...wei.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Paul Turner <pjt@...gle.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Thomas Graf <tgraf@...g.ch>,
	"Serge E. Hallyn" <serue@...ibm.com>,
	Vivek Goyal <vgoyal@...hat.com>,
	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>
Subject: Re: [PATCH REPOST RFC cgroup/for-3.7] cgroup: mark subsystems with
 broken hierarchy support and whine if cgroups are nested for them

On Fri, Sep 14, 2012 at 12:19:06PM +0400, Glauber Costa wrote:
> I want oppose it as well, but I believe part of this exercise is to make
> the need to have hierarchy widespread. Warning on the case
> 1st-level-only case helps with that, even if we make more noise than we
> should.
> 
> The reason I supported Tejun's proposal originally, is that I think that
> if we make the wrong amount of noise, being wrong by a surplus is better
> than being wrong by a deficit, in this case.

I think both are valid points and don't think it makes a lot of
difference either way.  Michal being the maintainer of the code, I'm
taking his approach for this one.

Thanks.

-- 
tejun
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