linux-kernel - Re: [PATCHSET] perf, cgroup: implement hierarchy support for perf

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Date:	Tue, 9 Apr 2013 15:07:56 +0800
From:	Li Zefan <lizefan@...wei.com>
To:	Tejun Heo <tj@...nel.org>
CC:	<mingo@...hat.com>, <a.p.zijlstra@...llo.nl>, <paulus@...ba.org>,
	<acme@...stprotocols.net>, <eranian@...gle.com>,
	<namhyung.kim@....com>, <mhocko@...e.cz>,
	<kamezawa.hiroyu@...fujitsu.com>, <cgroups@...r.kernel.org>,
	<containers@...ts.linux-foundation.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCHSET] perf, cgroup: implement hierarchy support for perf_event
 controller

On 2013/4/9 10:23, Tejun Heo wrote:
> perf_event cgroup controller is one of the remaining few with broken
> hierarchy support.  It turns out it's pretty easy to implement - the
> only thing necessary is making perf_cgroup_match() return %true also
> when the cgroup of the current task is a descendant of the event's
> cgroup.  This patchset implements cgroup_is_descendant() and uses it
> to implement hierarchy support in perf_event controller.
> 
> This patchset contains the following three patches.
> 
>  0001-cgroup-make-sure-parent-won-t-be-destroyed-before-it.patch
>  0002-cgroup-implement-cgroup_is_descendant.patch
>  0003-perf-make-perf_event-cgroup-hierarchical.patch
> 
> The patches are also available in the following git branch, which is
> based on top of cgroup/for-3.10.  It's currently based on top of
> cgroup/for-3.10 as the first patch causes non-trivial conflict with it
> otherwise, which is not difficult to resolve but still nice to avoid
> anyway.
> 
> Li, Michal, I picked the first two patches from Li's memcg patchset.
> Can we push the first two through cgroup/for-3.10 and put the rest in
> -mm?
> 

Sure. Andrew asked me to resend the memcg patchset when we are at 3.10-rc1,
because 3.9-rc6 is a bit too late and he's too busy.

> Ingo, how should these be routed?

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