linux-kernel - Re: [PATCH v2 00/14] perf, persistent: Kernel updates for perf tool integration

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Message-ID: <20130626095631.GB20274@pd.tnic>
Date:	Wed, 26 Jun 2013 11:56:31 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Robert Richter <rric@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Jiri Olsa <jolsa@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 00/14] perf, persistent: Kernel updates for perf tool
 integration

On Wed, Jun 26, 2013 at 11:46:34AM +0200, Ingo Molnar wrote:
> If already existing persistent events show up somewhere in sysfs
> (or in a separate pseudofilesystem) then an open() of them [given
> sufficient privileges of the caller, etc.] could attach to them.

Yep, I think we want to say sys_perf_event_open(attr.persistent=1) which
would give you a file descriptor to an already existing persistent event
with attr.config=<id>.

If it doesn't exist, it creates it.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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