rcu_cpu_stall_cputime
rcu_cpu_stall_ftrace_dump
rcu_cpu_stall_suppress
rcu_cpu_stall_suppress_at_boot
rcu_cpu_stall_timeout
rcu_exp_cpu_stall_timeout
rcu_exp_stall_task_details
rcu_expedited
rcu_normal
rcu_normal_after_boot
rcu_task_collapse_lim
rcu_task_contend_lim
rcu_task_enqueue_lim
rcu_task_ipi_delay
rcu_task_lazy_lim
rcu_task_stall_info
rcu_task_stall_info_mult
rcu_task_stall_timeout
rcu_tasks_lazy_ms
rcu_tasks_trace_lazy_ms