Michal Hocko wrote: > > Likewise, move do_send_sig_info(SIGKILL, victim) to before > > mark_oom_victim(victim) in case for_each_process() took very long time, > > for the OOM victim can abuse ALLOC_NO_WATERMARKS by TIF_MEMDIE via e.g. > > memset() in user space until SIGKILL is delivered. > > This is unrelated and I believe even not necessary. Why unnecessary? If serial console is configured and printing a series of "Kill process %d (%s) sharing same memory" took a few seconds, the OOM victim can consume all memory via malloc() + memset(), can't it? What to do if the OOM victim cannot die immediately after consuming all memory? I think that sending SIGKILL before setting TIF_MEMDIE helps reducing consumption of memory reserves. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>