My apology ! As per the test results history this problem started happening from Bad : next-20200430 (still reproducible on next-20200519) Good : next-20200429 The git tree / tag used for testing is from linux next-20200430 tag and reverted following three patches and oom-killer problem fixed. Revert "mm, memcg: avoid stale protection values when cgroup is above protection" Revert "mm, memcg: decouple e{low,min} state mutations from protectinn checks" Revert "mm-memcg-decouple-elowmin-state-mutations-from-protection-checks-fix" Ref tree: https://github.com/roxell/linux/commits/my-next-20200430 Build images: https://builds.tuxbuild.com/whyTLI1O8s5HiILwpLTLtg/ Test log: https://lkft.validation.linaro.org/scheduler/job/1444321#L1164 - Naresh