linux-kernel - Re: [RFC 3/5] perf: Allow per PMU access control

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Date:   Thu, 27 Sep 2018 13:15:59 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     Tvrtko Ursulin <tursulin@...ulin.net>
Cc:     linux-kernel@...r.kernel.org, tvrtko.ursulin@...ux.intel.com,
        Tvrtko Ursulin <tvrtko.ursulin@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.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>,
        Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>,
        Alexey Budankov <alexey.budankov@...ux.intel.com>,
        x86@...nel.org
Subject: Re: [RFC 3/5] perf: Allow per PMU access control

> +	mutex_lock(&pmus_lock);
> +	list_for_each_entry(pmu, &pmus, entry)
> +		pmu->perf_event_paranoid = sysctl_perf_event_paranoid;
> +	mutex_unlock(&pmus_lock);

What happens to pmus that got added later?

The rest looks good.

Can you post a non RFC version?

-Andi