RCU_JIFFIES_FQS_DIV 454 kernel/rcu/tree.c if (j < HZ / 10 + nr_cpu_ids / RCU_JIFFIES_FQS_DIV) RCU_JIFFIES_FQS_DIV 455 kernel/rcu/tree.c j = HZ / 10 + nr_cpu_ids / RCU_JIFFIES_FQS_DIV; RCU_JIFFIES_FQS_DIV 3435 kernel/rcu/tree.c d = RCU_JIFFIES_TILL_FORCE_QS + nr_cpu_ids / RCU_JIFFIES_FQS_DIV;