[RFC] Prefixing cgroup generic control filenames with "cgroup."

[serge at hallyn.com]

Quoting Paul Menage (menage at google.com):
> On Thu, Feb 28, 2008 at 1:21 PM, Andrew Morton
> <akpm at linux-foundation.org> wrote:
> 
> >
> >  Because if something is in /foo/bar/cgroup/notify_on_release then
> >  prefixing the filename with "cgroup_" seems pretty pointless.
> >
> 
> The point would be to avoid situations where a user has code that
> creates a group directory called "foo", and then in a future kernel
> release cgroups introduces a control file called "foo". If it's
> prefixed, then the user just has to avoid creating groups prefixed by
> "cgroup." or any subsystem name, so collisions will be less likely.

Have you already run into that case?

You said the set of files belong to cgroup itself is likely to increase
- do you have some candidates in mind?  Perhaps ones which are likely
to conflict with choice taskgroup names?

If anything I'd say add a 'prefix_cgroup' mount option and use it to
decide whether to prefix or not (rather than use the noprefix option).

-serge