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

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Date:	Wed, 10 Apr 2013 09:32:26 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Tejun Heo <tj@...nel.org>
Cc:	mingo@...nel.org, paulus@...ba.org, acme@...stprotocols.net,
	eranian@...gle.com, namhyung.kim@....com, lizefan@...wei.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 Mon, 2013-04-08 at 19:23 -0700, 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

Thanks, looks simple and straight fwd. 

> Ingo, how should these be routed?
> 
>  git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git perf_event-hierarchy-support

Ingo typically likes multi-maintainer sets to be pulled from a common
tree into all relevant maintainer trees so that git merges afterwards
just-work (tm). But I'll let him expand.

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