rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...0: (2 GPs behind) idle=3d54/1/0x40000002 softirq=4636/4641 fqs=5996
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:        0          0            0
rcu: 	cputime:        0          0            0   ==> 150050(ms)
rcu: 	(detected by 0, t=30006 jiffies, g=5737, q=384948 ncpus=2)
Sending NMI from CPU 0 to CPUs 1: