1CONFIG_SMP=y 2CONFIG_NR_CPUS=4 3CONFIG_PREEMPT_NONE=n 4CONFIG_PREEMPT_VOLUNTARY=n 5CONFIG_PREEMPT=y 6CONFIG_HZ_PERIODIC=n 7CONFIG_NO_HZ_IDLE=n 8CONFIG_NO_HZ_FULL=y 9CONFIG_TASKS_RCU=y 10CONFIG_RCU_EXPERT=y 11