Comment # 70 on bug 1159882 from Michal Hocko

(In reply to Robert Delahunt from comment #68)
> I set up one window doing dd if=/dev/zero of=/dev/sdc bs=4K 
> Another monitoring the output of df -h | grep cgroup every second

cgroup uses a virtual filesystem so df will not tell you much.

> Another monitoring directories under /sys/fs/cgroup/memory

I simply do not see how memcg controller enabled but not used can make any
picture.

[...]
> But yeah, back to the original topic, cgroups isn't using anything, but the
> machine dug into swap predictably, just like before.

All that with the latest kernel I have provided, right? Is this really
repeatable. Both with the cgroup controller disabled and enabled?