Re: [PATCH v2 2/3] mm: memcontrol: fix memcg id ref counter on swap charge move

[Johannes Weiner]

On Tue, Aug 02, 2016 at 06:00:49PM +0300, Vladimir Davydov wrote:
> Since commit 73f576c04b941 swap entries do not pin memcg->css.refcnt
> directly. Instead, they pin memcg->id.ref. So we should adjust the
> reference counters accordingly when moving swap charges between cgroups.
> 
> Fixes: 73f576c04b941 ("mm: memcontrol: fix cgroup creation failure after many small jobs")
> Signed-off-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
> Acked-by: Michal Hocko <mhocko@xxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx>	[3.19+]

Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>