[CRIU] [PATCH 1/2] cgroups: Add ability to reuse existing cgroup yard directory

[Cyrill Gorcunov]

On Tue, Jun 02, 2015 at 07:10:46PM +0300, Pavel Emelyanov wrote:
> > 
> > I think we should. This oprtion rather implies that tmpfs might
> > be premounted but noone guarantees that all controllers from
> > images will be mounted.
> 
> Can it happen IRL? Anyway, mounting new instances of controllers on 
> top of existing doesn't look like great idea. Maybe we'd better check 
> that all needed controllers are there and refuse restore otherwise?

Hard to tell if it happen in real life. For migration we will assume
that all controllers are prepared by phaul or someone else, thus maybe
it worth simply checking that controllers are mounted already. This is
the same as 'bindroot' mode by default.