rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1):
	(detected by 1, t=10502 jiffies, g=6973, q=1537)
rcu: All QSes seen, last rcu_preempt kthread activity 153 (4294957980-4294957827), jiffies_till_next_fqs=1, root ->qsmask 0x0