linux-kernel - Re: [PATCHv2 4/5] perf stat: Add -a as a default target

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Date:   Tue, 21 Feb 2017 15:05:44 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>, Jiri Olsa <jolsa@...nel.org>,
        David Ahern <dsahern@...il.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCHv2 4/5] perf stat: Add -a as a default target

On Tue, Feb 21, 2017 at 10:34:26AM -0300, Arnaldo Carvalho de Melo wrote:
> It _is_ supported by the kernel, and by the hardware, its just that it
> is not supported in system wide mode, that BTW, in the case above, the
> user doesn't even asked for (-a wasn't in the command line).

Well, that warning is issued for a bunch of errno's. Lumping them all
together is probably not what you want.

Also, EINVAL for example, as I noted earlier, can be issued for a
variety of conditions...

-- 
Regards/Gruss,
    Boris.

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