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: <20120913172137.GZ7677@google.com>
Date:	Thu, 13 Sep 2012 10:21:37 -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

Hello, Glauber.

On Thu, Sep 13, 2012 at 04:01:40PM +0400, Glauber Costa wrote:
> This is getting confusing for me as well, because I don't know if your
> reply was targeted towards me or Michal. As for me, I am in agreement
> with what you did, and I merely replied to Michal's concern and
> suggestion of not warning in the special 1-st level only setups saying I
> side with you.

Oh, I was replying to Michal.  I thought there was behavior difference
with the .use_hierarchy=0 cases that Michal was talking about but I
don't think that's the case and Michal is trying to say that we
shouldn't warn if the configuration behaves identical to
root.use_hierarchy=1 even if it contains some .use_hierarchy=0's,
which I'm fine with.

Thanks.

-- 
tejun
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