Erase memory pages as soon as they are freed to prevent new processes getting old information
sched: reduce sleep duration in wait_task_inactive
sched: don't call task_group() many times in set_task_rq()
rwsem: steal writing sem for better performance
 sched: Create sched_select_non_idle_cpu() to give preferred CPU for power saving
binfmt_elf: use get_random_int() to fix entropy depleting