[Devel] Re: [PATCH v5 14/14] Add documentation about the kmem controller

[Andrew Morton]

On Tue, 16 Oct 2012 14:16:51 +0400
Glauber Costa <glommer at parallels.com> wrote:

> +Kernel memory won't be accounted at all until limit on a group is set. This
> +allows for existing setups to continue working without disruption.  The limit
> +cannot be set if the cgroup have children, or if there are already tasks in the
> +cgroup.

What behaviour will usersapce see if "The limit cannot be set"? 
write() returns -EINVAL, something like that?