linux-kernel - Re: [RFC v3 0/5] Add capacity capping support to the CPU controller

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20170320145131.GA3623@htj.duckdns.org>
Date:   Mon, 20 Mar 2017 10:51:31 -0400
From:   Tejun Heo <tj@...nel.org>
To:     Patrick Bellasi <patrick.bellasi@....com>
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Paul Turner <pjt@...gle.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        John Stultz <john.stultz@...aro.org>,
        Todd Kjos <tkjos@...roid.com>,
        Tim Murray <timmurray@...gle.com>,
        Andres Oportus <andresoportus@...gle.com>,
        Joel Fernandes <joelaf@...gle.com>,
        Juri Lelli <juri.lelli@....com>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Dietmar Eggemann <dietmar.eggemann@....com>
Subject: Re: [RFC v3 0/5] Add capacity capping support to the CPU controller

Hello, Patrick.

On Tue, Feb 28, 2017 at 02:38:37PM +0000, Patrick Bellasi wrote:
>  a) Boosting of important tasks, by enforcing a minimum capacity in the
>     CPUs where they are enqueued for execution.
>  b) Capping of background tasks, by enforcing a maximum capacity.
>  c) Containment of OPPs for RT tasks which cannot easily be switched to
>     the usage of the DL class, but still don't need to run at the maximum
>     frequency.

As this is something completely new, I think it'd be a great idea to
give a couple concerete examples in the head message to help people
understand what it's for.

Thanks.

-- 
tejun