1rcupdate.rcu_self_test=1 2rcupdate.rcu_self_test_bh=1 3rcupdate.rcu_self_test_sched=1 4rcutree.rcu_fanout_exact=1 5rcutree.gp_preinit_delay=3 6rcutree.gp_init_delay=3 7rcutree.gp_cleanup_delay=3 8