Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
MIME-Version: 1.0
Reply-To: robert@ocallahan.org
In-Reply-To: <CAP045ApFKUqUUf76GtWyxpYWdWe1RxYkPm1R2kUxaQyc4Fhucg@mail.gmail.com>
References: <1529057003-2212-1-git-send-email-yao.jin@linux.intel.com>
 <CAP045Aq_FEc_pEeRL86uXbOLBeW7aPvTqtnaq+Mbi-2=vp2BNA@mail.gmail.com>
 <1a442b37-7a97-86f0-11e3-58d940ecfbc9@linux.intel.com> <CAP045ApFKUqUUf76GtWyxpYWdWe1RxYkPm1R2kUxaQyc4Fhucg@mail.gmail.com>
From:   "Robert O'Callahan" <robert@ocallahan.org>
Date:   Fri, 15 Jun 2018 10:34:42 -0700
Message-ID: <CAOp6jLadgwdiW+1BNFFhNSBD-i1ACju4PeuozxvD26Mrekwd9w@mail.gmail.com>
Subject: Re: [PATCH v1 0/2] perf: Drop leaked kernel samples
To:     Kyle Huey <me@kylehuey.com>
Cc:     "Jin, Yao" <yao.jin@linux.intel.com>, acme@kernel.org,
        jolsa@kernel.org, "Peter Zijlstra (Intel)" <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        open list <Linux-kernel@vger.kernel.org>,
        Vince Weaver <vincent.weaver@maine.edu>,
        Will Deacon <will.deacon@arm.com>,
        Stephane Eranian <eranian@google.com>,
        Namhyung Kim <namhyung@kernel.org>, ak@linux.intel.com,
        kan.liang@intel.com, yao.jin@intel.com
Content-Type: text/plain; charset="UTF-8"
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Fri, Jun 15, 2018 at 10:16 AM, Kyle Huey <me@kylehuey.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
-- 
Su ot deraeppa sah dna Rehtaf eht htiw saw hcihw, efil lanrete eht uoy
ot mialcorp ew dna, ti ot yfitset dna ti nees evah ew; deraeppa efil
eht. Efil fo Drow eht gninrecnoc mialcorp ew siht - dehcuot evah sdnah
ruo dna ta dekool evah ew hcihw, seye ruo htiw nees evah ew hcihw,
draeh evah ew hcihw, gninnigeb eht morf saw hcihw taht.