linux-kernel - Re: [patch] perf tools: perf list broken on ARM

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Message-ID: <alpine.DEB.2.10.1312092250020.6229@vincent-weaver-1.um.maine.edu>
Date:	Mon, 9 Dec 2013 22:58:46 -0500 (EST)
From:	Vince Weaver <vincent.weaver@...ne.edu>
To:	Namhyung Kim <namhyung@...nel.org>
cc:	Vince Weaver <vincent.weaver@...ne.edu>,
	linux-kernel@...r.kernel.org,
	Chad Paradis <chad.paradis@...t.maine.edu>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...hat.com>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [patch] perf tools: perf list broken on ARM

On Tue, 10 Dec 2013, Namhyung Kim wrote:

> Hi Vince,
> Okay, the reason I set the bit was consideration of a very strict
> perf_event_paranoid setting (-2).
> 
> So maybe we can try it again with the bit cleared after a failure, or
> checking the paranoid setting first.

If perf_event_paranoid is set to 2 then you should get EPERM rather than 
ENOENT or EINVAL, right?  Maybe that could be used too.

As a side note, why doesn't paranoid 2 block events that don't have
exclude_hv set?

Vince
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