rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...0: (1 GPs behind) idle=f974/1/0x40000002 softirq=12696/12696 fqs=14968
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:        0          0            0
rcu: 	cputime:        0          0            0   ==> 150010(ms)
rcu: 	(detected by 1, t=30002 jiffies, g=27181, q=474 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
After 10 seconds, these CPUS still haven't responded to the NMI: 0