linux-kernel - Re: [PATCH] perf: Cleanup user's child events

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Date:	Fri, 15 Jan 2016 15:05:33 +0200
From:	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	vince@...ter.net, eranian@...gle.com,
	Arnaldo Carvalho de Melo <acme@...radead.org>
Subject: Re: [PATCH] perf: Cleanup user's child events

Peter Zijlstra <peterz@...radead.org> writes:

> On Fri, Jan 15, 2016 at 01:22:15PM +0200, Alexander Shishkin wrote:
>> Events are leaking in the following scenario: user creates an event for
>> task A, task A forks into B (producing a child event), user closes the
>> original event. Both original user's event and its child will remain for
>> as long as task B is around. In other words, we don't clean up children
>> when we try to release the parent.
>
> The orphan stuff should clear those up, no?

Not if they don't schedule after the parent's gone.

Regards,
--
Alex