Re: [RFC PATCH 01/15] mm: memcontrol: fix page charging in page replacement

[Johannes Weiner]

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>