On Fri, Oct 02, 2020 at 12:03:50PM +0200, Michal Koutný wrote: > On Thu, Oct 01, 2020 at 01:27:13PM -0400, Johannes Weiner <hannes@xxxxxxxxxxx> wrote: > > I do think there is a bug, though: mem_cgroup_move_account() should > > use WRITE_ONCE() on page->mem_cgroup. > If this were a bug, wouldn't be the proper approach > rcu_assign_pointer()/rcu_dereference() pair? Yes, you're right. I'll double check these code paths and follow up with a patch if necessary.
