linux-kernel - Re: [PATCH] perf tools: report PERF_FLAG_FD

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Message-ID: <20140803121259.GB1181@krava.brq.redhat.com>
Date:	Sun, 3 Aug 2014 14:12:59 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Yann Droneaud <ydroneaud@...eya.com>
Cc:	Jiri Olsa <jolsa@...nel.org>, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...ux.intel.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Paul Mackerras <paulus@...ba.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Namhyung Kim <namhyung@...il.com>,
	Stephane Eranian <eranian@...gle.com>,
	William Cohen <wcohen@...hat.com>
Subject: Re: [PATCH] perf tools: report PERF_FLAG_FD_CLOEXEC probing error
 once

On Sat, Aug 02, 2014 at 08:13:22PM +0200, Yann Droneaud wrote:
> In case of failure, unrelated to PERF_FLAG_FD_CLOEXEC,
> perf_flag_probe() reports the error twice. For example:
> 
>   $ perf record ls
>   Error:
>   perf_event_open(..., PERF_FLAG_FD_CLOEXEC) failed with unexpected error 16 (Device or resource busy)
>   perf_event_open(..., 0) failed unexpectedly with error 16 (Device or resource busy)

seems ok,
but since your patch is not based on my other patch,
please provide the changelog perf out without it

---
>   The PMU counters are busy/taken by another profiler.
>   We found oprofile daemon running, please stop it and try again.
---

also, please provide both before and after outputs
I'll queue it up with those other 2 patches

thanks,
jirka
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