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: <20120911174319.GO7677@google.com>
Date:	Tue, 11 Sep 2012 10:43:19 -0700
From:	Tejun Heo <tj@...nel.org>
To:	Li Zefan <lizefan@...wei.com>
Cc:	linux-kernel@...r.kernel.org,
	containers@...ts.linux-foundation.org, cgroups@...r.kernel.org,
	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>,
	"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,

On Tue, Sep 11, 2012 at 10:08:37AM -0700, Tejun Heo wrote:
> > So isn't cpuset broken too? child cpuset's cpu mask isn't necessary a subset
> > of the parent's if the cpu_exclusive flag is not set.
> 
> Heh, didn't even look at that.  Just assumed it was in the same boat
> w/ cpu{acct}.  Will take a look.

Hmm... Looked at it and I don't think hierarchy support is broken w/
or w/o exclusive.  Can you please elaborate?

Thanks.

-- 
tejun
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