BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 252s!
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=-20 stuck for 250s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=3/256
    pending: dst_gc_task, linkwatch_event, vmstat_shepherd
workqueue kblockd: flags=0x18
  pwq 3: cpus=1 node=0 flags=0x0 nice=-20 active=2/256
    pending: blk_timeout_work, cfq_kick_queue
workqueue vmstat: flags=0xc
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
    pending: vmstat_update
workqueue ipv6_addrconf: flags=0x40008
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1
    pending: addrconf_dad_work