On Wed, 25 Dec 2019 13:36:48 +0800 Hui Zhu <teawater@xxxxxxxxx> wrote: > Even if cgroup2 has swap.max, swappiness is still a very useful config. > This commit add swappiness to cgroup2. > > ... > > --- a/mm/memcontrol.c > +++ b/mm/memcontrol.c > @@ -7143,6 +7143,11 @@ static struct cftype swap_files[] = { > .file_offset = offsetof(struct mem_cgroup, swap_events_file), > .seq_show = swap_events_show, > }, > + { > + .name = "swappiness", > + .read_u64 = mem_cgroup_swappiness_read, > + .write_u64 = mem_cgroup_swappiness_write, > + }, > { } /* terminate */ > }; There should be a Documentation/ update with this?