There is no entry file_mapped in the memory.stat file. This looks like a
simple word flip that's gone unnoticed since 2010 (dc10e281,
memcg: update documentation).
Signed-off-by: NFlorian Schmidt <florian.schmidt@neclab.eu>
Acked-by: NMichal Hocko <mhocko@suse.com>
Signed-off-by: NTejun Heo <tj@kernel.org>