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

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Message-ID: <20160115125453.GK6357@twins.programming.kicks-ass.net>
Date:	Fri, 15 Jan 2016 13:54:53 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
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

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?