Hi reviewers, I suggest to backport a commit to Linux 4.4 and 4.9 stable tree. Reason: the double decrease of nr_reserved_highatomic will generate many high atomic pages in the system and it may cause out-of-memory issues under long duration test. commit:4855e4a7f29d6d10b0b9c84e189c770c9a94e91e subject:mm: prevent double decrease of nr_reserved_highatomic kernel version to apply to:kernel 4.4 and 4.9 thanks, Miles