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

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Message-Id: <577261FA.1020108@linux.vnet.ibm.com>
Date:	Tue, 28 Jun 2016 17:09:38 +0530
From:	Aravinda Prasad <aravinda@...ux.vnet.ibm.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	linux-kernel@...r.kernel.org, rostedt@...dmis.org,
	mingo@...hat.com, paulus@...ba.org, acme@...nel.org,
	ebiederm@...ssion.com, hbathini@...ux.vnet.ibm.com,
	ananth@...ibm.com
Subject: Re: [RFC PATCH 2/2] perf: Filter events based on perf-namespace



On Monday 27 June 2016 09:20 PM, Peter Zijlstra wrote:
> 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.
> 

Yes.. that seems possible. Let me check that out.

-- 
Regards,
Aravinda