Re: [PATCH] mm: memcontrol: fix percpu vmstats and vmevents flush

From: Roman Gushchin
Date: Thu Aug 29 2019 - 16:40:29 EST

On Thu, Aug 29, 2019 at 01:31:10PM -0700, Shakeel Butt wrote:
> Instead of using raw_cpu_read() use per_cpu() to read the actual data of
> the corresponding cpu otherwise we will be reading the data of the
> current cpu for the number of online CPUs.
> Fixes: bb65f89b7d3d ("mm: memcontrol: flush percpu vmevents before releasing memcg")
> Fixes: c350a99ea2b1 ("mm: memcontrol: flush percpu vmstats before releasing memcg")
> Signed-off-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
> Cc: Roman Gushchin <guro@xxxxxx>
> Cc: Michal Hocko <mhocko@xxxxxxxx>
> Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
> Cc: Vladimir Davydov <>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx>

Ouch, thanks Shakeel!

Acked-by: Roman Gushchin <guro@xxxxxx>