linux-kernel - Re: [PATCHv6] perf tools: enable close-on-exec flag on perf file descriptor

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Message-ID: <20140712232821.GC29028@krava.redhat.com>
Date:	Sun, 13 Jul 2014 01:28:21 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Yann Droneaud <ydroneaud@...eya.com>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Andi Kleen <ak@...ux.intel.com>,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>,
	Stephane Eranian <eranian@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Michael Ellerman <michael@...erman.id.au>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCHv6] perf tools: enable close-on-exec flag on perf file
 descriptor

On Mon, Jun 30, 2014 at 10:28:47PM +0200, Yann Droneaud wrote:
> In commit a21b0b354d4a ('perf: Introduce a flag to enable
> close-on-exec in perf_event_open()'), flag PERF_FLAG_FD_CLOEXEC
> was added to perf_event_open(2) syscall to allows userspace
> to atomically enable close-on-exec behavor when creating
> the file descriptor.
> 
> This patch makes perf tools use the new flag if supported
> by the kernel, so that the event file descriptors got
> automatically closed if perf tool exec a sub-command.
> 
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Arnaldo Carvalho de Melo <acme@...stprotocols.net>
> Cc: Jiri Olsa <jolsa@...hat.com>
> Cc: Andi Kleen <ak@...ux.intel.com>
> Cc: Ingo Molnar <mingo@...nel.org>
> Signed-off-by: Yann Droneaud <ydroneaud@...eya.com>
> ---
> 
> Hi,
> 
> I've addressed the issues reported by Jiri Olsa,
> please have a look at the update patch.

hi,
I'll queue this one

thanks,
jirka
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