On Mon, Apr 20, 2020 at 06:11:16PM -0400, Johannes Weiner wrote: > Anonymous compound pages can be mapped by ptes, which means that if we > want to track NR_MAPPED_ANON, NR_ANON_THPS on a per-cgroup basis, we > have to be prepared to see tail pages in our accounting functions. > > Make mod_lruvec_page_state() and lock_page_memcg() deal with tail > pages correctly, namely by redirecting to the head page which has the > page->mem_cgroup set up. > > Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx> Reviewed-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
