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

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Date:	Wed, 19 Oct 2011 16:09:51 -0700
From:	Paul Menage <paul@...lmenage.org>
To:	Lennart Poettering <mzxreary@...inter.de>
Cc:	Kay Sievers <kay.sievers@...y.org>, linux-kernel@...r.kernel.org,
	harald@...hat.com, david@...ar.dk, greg@...ah.com
Subject: Re: A Plumber’s Wish List for Linux

On Wed, Oct 19, 2011 at 4:03 PM, Lennart Poettering
<mzxreary@...inter.de> wrote:
>
> For our systemd usecase a cgroup.signal file would not be useful. This
> is because we actually kill all members of the service's cgroup plus the
> main process of the service, which is usually also in the service's
> cgroup but sometimes isn't (for example: when the user logs in, the
> whole /sbin/login process ends up in the user's session cgroup, and is
> removed from the original service cgroup). Since we want to avoid
> killing the main service process twice in the case where it isn't in the
> servce cgroup we'd hence prefer to have some fork throttling logic in
> place, so that we can kill members flexibly in accordance with these
> rules.

By fork-throttling, do you just mean "0 or unlimited", or would you
actually want some kind of rate-limited throttling? If the former,
than I agree with Frederick that his task counter should solve that
problem.

Paul
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