On Fri, Oct 02, 2020 at 10:25:58AM -0700, Roman Gushchin wrote: > The lowest bit in page->memcg_data is used to distinguish between > struct memory_cgroup pointer and a pointer to a objcgs array. > All checks and modifications of this bit are open-coded. > > Let's formalize it using page memcg flags, defined in enum > page_memcg_data_flags. > > Additional flags might be added later. > > Signed-off-by: Roman Gushchin <guro@xxxxxx> > Reviewed-by: Shakeel Butt <shakeelb@xxxxxxxxxx> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
