BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 186s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256
    pending: dst_gc_task, xfrm_state_gc_task
workqueue events_power_efficient: flags=0x80
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256
    pending: gc_worker, neigh_periodic_work, neigh_periodic_work
workqueue kblockd: flags=0x18
  pwq 1: cpus=0 node=0 flags=0x0 nice=-20 active=2/256
    pending: cfq_kick_queue, blk_timeout_work
workqueue vmstat: flags=0xc
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
    pending: vmstat_update
workqueue dm_bufio_cache: flags=0x8
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
    pending: work_fn
workqueue ipv6_addrconf: flags=0x40008
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/1
    pending: addrconf_verify_work