On Tue, Jun 23, 2020 at 11:47 AM Roman Gushchin <guro@xxxxxx> wrote: > > Memory cgroups are using large chunks of percpu memory to store vmstat > data. Yet this memory is not accounted at all, so in the case when there > are many (dying) cgroups, it's not exactly clear where all the memory is. > > Because the size of memory cgroup internal structures can dramatically > exceed the size of object or page which is pinning it in the memory, it's > not a good idea to simple ignore it. It actually breaks the isolation *simply > between cgroups. > > Let's account the consumed percpu memory to the parent cgroup. > > Signed-off-by: Roman Gushchin <guro@xxxxxx> > Acked-by: Dennis Zhou <dennis@xxxxxxxxxx> Reviewed-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
