Tetsuo Handa wrote: > But this is not safe for CONFIG_MMU=y kernels as well. > can_oom_reap == false means that oom_reap_task() will not be called. > It is possible that the TIF_MEMDIE thread falls into > > atomic_read(&task->signal->oom_victims) > 0 && find_lock_task_mm(task) == > NULL > > situation. We are still risking OOM livelock. We must somehow clear (or > ignore) > TIF_MEMDIE even if oom_reap_task() is not called.
Oops. mmput() from exit_mm() does not block in that case. So, we won't livelock here. > > Can't we apply > http://lkml.kernel.org/r/201606102323.bcc73478.ftojhfqmsvf...@i-love.sakura.ne.jp > now? >
