[88992.040892] rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0 -... 2-... 3-... } 6368 jiffies s: 149 root: 0xd/. [88992.052433] rcu: blocking rcu_node structures (internal RCU debug): [88992.058725] Task dump for CPU 0: [88992.061967] task:swapper/0 state:R...