[CRIU] [PATCH] cgroups: get controllers from /proc/self/cgroups (v2)

[Cyrill Gorcunov]

On Fri, Sep 11, 2015 at 06:35:46PM +0300, Andrey Vagin wrote:
> Some controllers can be disabled in kernel options. In this case they
> are shown in /proc/cgroups, but they could not be mounted.
> 
> All enabled controllers can be collected from /proc/self/cgroup.
> 
> https://github.com/xemul/criu/issues/28
> 
> v2: ',' is used to separate controllers
> 
> Cc: Tycho Andersen <tycho.andersen at canonical.com>
> Reported-by: Ross Boucher <boucher at gmail.com>
> Signed-off-by: Andrey Vagin <avagin at openvz.org>
>  

Could you please explain why can't you test the "active"
field from /proc/cgroups and simply skip the controller
if it's disabled?