linux-kernel - Re: [PATCH v4 00/16] perf, persistent: Add persistent events

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Message-ID: <20140506185359.GE25013@pd.tnic>
Date:	Tue, 6 May 2014 20:53:59 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Robert Richter <rric@...nel.org>
Cc:	Jean Pihet <jean.pihet@...aro.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Jiri Olsa <jolsa@...hat.com>, linux-kernel@...r.kernel.org,
	Tomasz Nowicki <tomasz.nowicki@...aro.org>
Subject: Re: [PATCH v4 00/16] perf, persistent: Add persistent events

On Tue, May 06, 2014 at 02:39:07PM +0200, Robert Richter wrote:
> Events could also be shared transparently. This means, if there is
> already an event running with the same attr, it could be reused. Not
> sure if this makes sense much and is also feasible. Most events are
> opened with writable buffers and thus can not be shared anyway.

Well, this is simple: sharing events implicitly says they're read-only -
you can't share them otherwise. If you want the buffers to be writable,
then the events cannot be shared.

I think this is nicely simple.

-- 
Regards/Gruss,
    Boris.

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