linux-kernel - Re: [PATCHSET v2 cgroup/for-4.6] cgroup, perf_event: make perf

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Date:	Thu, 3 Mar 2016 10:06:54 -0500
From:	Tejun Heo <tj@...nel.org>
To:	lizefan@...wei.com, hannes@...xchg.org, a.p.zijlstra@...llo.nl,
	mingo@...hat.com, acme@...nel.org
Cc:	linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
	kernel-team@...com
Subject: Re: [PATCHSET v2 cgroup/for-4.6] cgroup, perf_event: make perf_event
 work on v2 hierarchy

Hello,

On Wed, Feb 24, 2016 at 05:12:53PM -0500, Tejun Heo wrote:
> This patchset makes perf_event implicitly enabled on the v2 hierarchy
> so that cgroup v2 path automatically works with "perf record --cgroup"
> as long as perf_event controller is available and not mounted on a
> legacy hierarchy.  "perf record" is updated so that it searches for
> both v1 hierarchy w/ perf_event on it and v2 hierarchy.  The v1
> hierarchy is used if exists; otherwise, v2 is used, making the
> transition transparent to users.

All the prerequisite patches are now available in cgroup/for-4.6
branch.

 git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-4.6

If the perf_event changes look okay, we can either apply the first
patch to cgroup/for-4.6, pull that into perf tree and aply the perf
change there or route both through cgroup tree.  Ideas?

Thanks.

-- 
tejun