linux-kernel - Re: [RFC] perf: Allow fine-grained PMU access control

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Message-ID: <20180119164540.GT2228@hirez.programming.kicks-ass.net>
Date:   Fri, 19 Jan 2018 17:45:40 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Tvrtko Ursulin <tursulin@...ulin.net>
Cc:     Intel-gfx@...ts.freedesktop.org,
        Tvrtko Ursulin <tvrtko.ursulin@...el.com>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC] perf: Allow fine-grained PMU access control

On Thu, Jan 18, 2018 at 06:40:07PM +0000, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin@...el.com>
> 
> For situations where sysadmins might want to allow different level of
> of access control for different PMUs, we start creating per-PMU
> perf_event_paranoid controls in sysfs.

You've completely and utterly failed to explain why.