rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: {
 0-....
 } 2649 jiffies s: 297 root: 0x0/.
rcu: blocking rcu_node structures (internal RCU debug):

rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: {
 0-...D
 } 2650 jiffies s: 301 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):