This series contains a fix for a edge case in my earlier protection calculation patches, and a patch to make the area overall a little more robust to hopefully help avoid this in future. Changes in v4: - Fix premature OOM when checking protection on root memcg. Thanks Naresh and Michal for helping debug. Chris Down (1): mm, memcg: Decouple e{low,min} state mutations from protection checks Yafang Shao (1): mm, memcg: Avoid stale protection values when cgroup is above protection include/linux/memcontrol.h | 95 ++++++++++++++++++++++++++++++++------ mm/memcontrol.c | 36 ++++++--------- mm/vmscan.c | 20 +++----- 3 files changed, 103 insertions(+), 48 deletions(-) -- 2.27.0