BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 150s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256
    in-flight: 22:rtc_timer_do_work
    pending: vmstat_shepherd
workqueue events_power_efficient: flags=0x80
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256
    pending: gc_worker, neigh_periodic_work
workqueue ipv6_addrconf: flags=0x40008
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1
    pending: addrconf_verify_work
pool 2: cpus=1 node=0 flags=0x0 nice=0 hung=150s workers=2 idle: 18