Re: [RFC PATCH 2/2] perf: Filter events based on perf-namespace

From	Peter Zijlstra <peterz@infradead.org>
Newsgroups	linux.kernel
Subject	Re: [RFC PATCH 2/2] perf: Filter events based on perf-namespace
Date	2016-06-27 18:00 +0200
Message-ID	<rOH73-2eF-9@gated-at.bofh.it> (permalink)
References	<rJZHk-7nr-19@gated-at.bofh.it> <rJZQZ-7rp-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Tue, Jun 14, 2016 at 10:19:51PM +0530, Aravinda Prasad wrote:
> Whenever perf tool is executed inside a container, this
> patch restricts the events to the perf-namespace in which
> the perf tool is executing.
> 
> This patch is based on the existing support available
> for tracing with cgroups.
> 
> TODO:
>     - Avoid code duplication.

Can't you, at perf_event_open() time, convert a per-cpu event into a
per-cpu-per-cgroup event for these namespace thingies?

That seems to immediately and completely remove all that duplication.

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Re: [RFC PATCH 2/2] perf: Filter events based on perf-namespace Peter Zijlstra <peterz@infradead.org> - 2016-06-27 18:00 +0200
  Re: [RFC PATCH 2/2] perf: Filter events based on perf-namespace Aravinda Prasad <aravinda@linux.vnet.ibm.com> - 2016-06-28 13:50 +0200

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