linux-kernel - Re: [PATCH v1 0/2] perf: Drop leaked kernel samples

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Message-ID: <CAOp6jLadgwdiW+1BNFFhNSBD-i1ACju4PeuozxvD26Mrekwd9w@mail.gmail.com>
Date:   Fri, 15 Jun 2018 10:34:42 -0700
From:   "Robert O'Callahan" <robert@...llahan.org>
To:     Kyle Huey <me@...ehuey.com>
Cc:     "Jin, Yao" <yao.jin@...ux.intel.com>, acme@...nel.org,
        jolsa@...nel.org, "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        open list <Linux-kernel@...r.kernel.org>,
        Vince Weaver <vincent.weaver@...ne.edu>,
        Will Deacon <will.deacon@....com>,
        Stephane Eranian <eranian@...gle.com>,
        Namhyung Kim <namhyung@...nel.org>, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH v1 0/2] perf: Drop leaked kernel samples

On Fri, Jun 15, 2018 at 10:16 AM, Kyle Huey <me@...ehuey.com> wrote:
>
> If you want a sysctl for your own reasons that's fine. But we don't
> want a sysctl. We want to work without any further configuration.

Also toggling a sysctl would require root privileges, but rr does not
currently need to run as root. Thus rr users would have to either
permanently change their system configuration (and every extra
configuration step is a pain), or run rr as root so rr can toggle the
sysctl itself. Running rr as root is highly undesirable.

Rob
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