On Wed, 25 Apr 2018, Tetsuo Handa wrote: > > One of the reasons that I extracted __oom_reap_task_mm() out of the new > > oom_reap_task_mm() is to avoid the checks that would be unnecessary when > > called from exit_mmap(). In this case, we can ignore the > > mm_has_blockable_invalidate_notifiers() check because exit_mmap() has > > already done mmu_notifier_release(). So I don't think there's a concern > > about __oom_reap_task_mm() blocking while holding oom_lock. Unless you > > are referring to something else? > > Oh, mmu_notifier_release() made mm_has_blockable_invalidate_notifiers() == false. OK. > > But I want comments why it is safe; I will probably miss that dependency > when we move that code next time. > Ok, makes sense. I'll send a v3 to update the comment.
