On Tue, Mar 30, 2021 at 06:15:17PM +0800, Muchun Song wrote: > The pages aren't accounted at the root level, so do not charge the page > to the root memcg in page replacement. Although we do not display the > value (mem_cgroup_usage) so there shouldn't be any actual problem, but > there is a WARN_ON_ONCE in the page_counter_cancel(). Who knows if it > will trigger? So it is better to fix it. > > Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
