[PATCH stable-4.4 0/3] backport memcg id patches

[Michal Hocko]

Hi,
this is my attempt to backport Johannes' 73f576c04b94 ("mm: memcontrol:
fix cgroup creation failure after many small jobs") to 4.4 based stable
kernel. The backport is not straightforward and there are 2 follow up
fixes on top of this commit. I would like to integrate these to our SLES
based kernel and believe other users might benefit from the backport as
well. All 3 patches are in the Linus tree already.

I would really appreciate if Johannes could double check after me before
this gets into the stable tree but my testing didn't reveal anything
unexpected.

Thanks!