max_rcu_stall_to_panic

file: /proc/sys/kernel/max_rcu_stall_to_panic
variable: kernel.max_rcu_stall_to_panic
Official reference

When panic_on_rcu_stall is set to 1, this value determines the number of times that RCU can stall before panic() is called.

When panic_on_rcu_stall is set to 0, this value is has no effect.