BUG: workqueue lockup - pool cpus=0-1 flags=0x4 nice=0 stuck for 267s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=4/256
    pending: perf_sched_delayed, flow_cache_gc_task, flow_cache_gc_task, flow_cache_gc_task
workqueue events_unbound: flags=0x2
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/512
    pending: call_usermodehelper_exec_work
workqueue events_power_efficient: flags=0x80
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
    pending: gc_worker
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256
    pending: check_lifetime, neigh_periodic_work
workqueue writeback: flags=0x4e
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/256
    pending: wb_workfn
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
EXT4-fs (sda1): re-mounted. Opts: 
EXT4-fs (sda1): re-mounted. Opts: