Date: Mon, 14 Dec 2015 14:54:45 -0300
From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>, Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@kernel.org>, Jiri Olsa <jolsa@redhat.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Andi Kleen <andi@firstfloor.org>,
        Stephane Eranian <eranian@google.com>,
        Adrian Hunter <adrian.hunter@intel.com>
Subject: Re: [PATCHSET 00/16] perf top: Add multi-thread support (v1)
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Em Tue, Dec 15, 2015 at 02:06:54AM +0900, Namhyung Kim escreveu:
> On Mon, Dec 14, 2015 at 07:46:28AM -0700, David Ahern wrote:
> > If you have 1-thread per cpu that means you are pinning the threads to the
> > cpu? That brings in additional permissions problems.
> 
> Did you mean setting sched affinity?  It seems not a privileged
> operation doing it for its own threads..

Right, and we should do it (create per cpu rb consuming threads) just
for the cpus in the workload affinity mask.

- Arnaldo
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