Memcg/kmem reclaim support has been finally merged. Reflect this in the
documentation.
Acked-by: NMichal Hocko <mhocko@suse.cz>
Signed-off-by: NVladimir Davydov <vdavydov@parallels.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>