[Devel] [PATCH 1/2] memcg: fix memcg_size() calculation

[Glauber Costa]

On Mon, Dec 16, 2013 at 8:47 PM, Michal Hocko <mhocko at suse.cz> wrote:
> On Sat 14-12-13 12:15:33, Vladimir Davydov wrote:
>> The mem_cgroup structure contains nr_node_ids pointers to
>> mem_cgroup_per_node objects, not the objects themselves.
>
> Ouch! This is 2k per node which is wasted. What a shame I haven't
> noticed this back then when reviewing 45cf7ebd5a033 (memcg: reduce the
> size of struct memcg 244-fold)
>
IIRC, they weren't pointers back then. I think they were embedded in
the structure, and I let
them embedded.
My mind may be tricking me, but I think I recall that Johannes changed
them to pointers
in a later time. No ?

In any case, this is correct.