On 2021/10/20 23:57, Michal Hocko wrote: > One argument for removing it from here is the maintainability. Now you > have a memcg specific check which is not in sync with the oom. E.g. > out_of_memory does task_will_free_mem as the very first thing. You are > also automatically excluding oom killer for cases where that might make > a sense. What makes it possible to remove this check? This check was added because task_will_free_mem() in out_of_memory() does NOT work. See commit 7775face207922ea ("memcg: killed threads should not invoke memcg OOM killer").