From: Tejun Heo <tj@kernel.org>
To: lizefan@huawei.com, hannes@cmpxchg.org, a.p.zijlstra@chello.nl,
mingo@redhat.com, acme@kernel.org
Cc: linux-kernel@vger.kernel.org, cgroups@vger.kernel.org,
kernel-team@fb.com
Subject: Re: [PATCH REPOST 2/2] cgroup, perf_event: make perf_event controller work on cgroup2 hierarchy
Date: Thu, 2 Feb 2017 13:47:32 -0500 [thread overview]
Message-ID: <20170202184732.GA7917@htj.duckdns.org> (raw)
In-Reply-To: <20170129193520.GA18336@mtj.duckdns.org>
On Sun, Jan 29, 2017 at 02:35:20PM -0500, Tejun Heo wrote:
> perf_event is a utility controller whose primary role is identifying
> cgroup membership to filter perf events; however, because it also
> tracks some per-css state, it can't be replaced by pure cgroup
> membership test. Mark the controller as implicitly enabled on the
> default hierarchy so that perf events can always be filtered based on
> cgroup v2 path as long as the controller is not mounted on a legacy
> hierarchy.
>
> "perf record" is updated accordingly so that it searches for both v1
> and v2 hierarchies. A v1 hierarchy is used if perf_event is mounted
> on it; otherwise, it uses the v2 hierarchy.
>
> v2: Doc updated to reflect more flexible rebinding behavior.
>
> Signed-off-by: Tejun Heo <tj@kernel.org>
> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Applied to cgroup/for-4.11.
Thanks.
--
tejun
next prev parent reply other threads:[~2017-02-02 18:47 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-24 22:12 [PATCHSET v2 cgroup/for-4.6] cgroup, perf_event: make perf_event work on v2 hierarchy Tejun Heo
2016-02-24 22:12 ` [PATCH 1/2] cgroup: implement cgroup_subsys->implicit_on_dfl Tejun Heo
2016-03-08 15:59 ` Tejun Heo
2016-02-24 22:12 ` [PATCH 2/2] cgroup, perf_event: make perf_event controller work on cgroup2 hierarchy Tejun Heo
2016-03-08 10:11 ` Peter Zijlstra
2017-01-29 19:35 ` [PATCH REPOST " Tejun Heo
2017-01-30 14:05 ` Arnaldo Carvalho de Melo
2017-01-30 15:07 ` Tejun Heo
2017-02-02 18:47 ` Tejun Heo [this message]
2016-03-03 15:06 ` [PATCHSET v2 cgroup/for-4.6] cgroup, perf_event: make perf_event work on v2 hierarchy Tejun Heo
2016-03-08 1:44 ` Tejun Heo
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