linux-kernel - Re: A Plumber’s Wish List for Linux

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Message-Id: <20111011161600.6145aa6b.akpm@linux-foundation.org>
Date:	Tue, 11 Oct 2011 16:16:00 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Kay Sievers <kay.sievers@...y.org>
Cc:	linux-kernel@...r.kernel.org, lennart@...ttering.net,
	harald@...hat.com, david@...ar.dk, greg@...ah.com,
	"Kirill A. Shutemov" <kirill@...temov.name>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: A Plumber’s Wish List for Linux


Useful email, thanks.

On Fri, 07 Oct 2011 01:17:02 +0200
Kay Sievers <kay.sievers@...y.org> wrote:

> We___d like to share our current wish list of plumbing layer features we

gargh.  gmail?

>
> ...
>
> * fork throttling mechanism as basic cgroup functionality that is
> available in all hierarchies independent of the controllers used:
> This is important to implement race-free killing of all members of a
> cgroup, so that cgroup member processes cannot fork faster then a cgroup
> supervisor process could kill them. This needs to be recursive, so that
> not only a cgroup but all its subgroups are covered as well.

Frederic Weisbecker's "cgroups: add a task counter subsystem" should
address this.  Does it meet these requirments?  Have you tested it?

>
> ...
>
> * Add a timerslack cgroup controller, to allow increasing the timer
> slack of user session cgroups when the machine is idle.

Kirill Shutemov has just posted "cgroups: introduce timer slack
controller".  Again, is that sufficient?  Have you reviewed and tested
it?

>
> ...
>
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