linux-kernel - Re: [PATCH] perf record: Change error message on failure

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Message-ID: <20120913150720.GA27411@gmail.com>
Date:	Thu, 13 Sep 2012 17:07:20 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Robert Richter <robert.richter@....com>
Cc:	Arnaldo Carvalho de Melo <acme@...hat.com>,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH] perf record: Change error message on failure


* Robert Richter <robert.richter@....com> wrote:

> Only report
> 
>  No CONFIG_PERF_EVENTS=y kernel support configured?
> 
> if the syscall fails with ENOSYS. In other cases CONFIG_PERF_EVENTS is
> set and might confuse users. The default message is now:
> 
>  Not all events could be opened.

Indeed, and it would be nice to be even less passive-aggressive 
and figure out and display the exact error condition?

Thanks,

	Ingo
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