Getting a hold of the mm and locking the mmap_lock would be sufficient I guess.That's exactly what I do here. The simplified sequence is: task_lock if (task_will_free_mem()) mm=mmget() task_unlock if (!mm) return; mmap_read_lock(mm) __oom_reap_task_mm(mm) mmap_read_unlock(mm) mmput(mm) Or did I misunderstand your comments?
Oh, sorry, my tired eyes confused "put_task_struct()" with "task_unlock()" and even "mmget()" with "mmgrab()" ...
So this is essentially get_task_mm() with an additional task_will_free_mem() check.
LGHTM! :) -- Thanks, David / dhildenb
