Re: [RFC PATCH 1/4] cgroups: Allow a cgroup subsys to reject a fork

From: Paul Menage
Date: Tue Jun 21 2011 - 13:39:31 EST

On Sun, Jun 19, 2011 at 4:51 PM, Frederic Weisbecker <fweisbec@xxxxxxxxx> wrote:
> Make the cgroup subsystem fork callback return a value
> so that subsystems are able to accept or reject a fork
> completion with a custom error value.

This is unnecessary complexity in the cgroup subsystem (and seems to
miss cleanup for subsystems that have previously had their fork()
method return success).

If you want a subsystem to be able to reject a fork, I think it's
better to have that subsystem be called explicitly from do_fork(), and
keep that logic out of cgroups.

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