BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 42s!
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 42s!
BUG: workqueue lockup - pool cpus=0-1 flags=0x4 nice=0 stuck for 40s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=6/256
    pending: defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, cache_reap
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=6/256
    pending: vmstat_shepherd, cache_reap, defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler
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=1/256
    pending: neigh_periodic_work
workqueue mm_percpu_wq: flags=0x8
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
    pending: vmstat_update
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
    pending: vmstat_update
workqueue writeback: flags=0x4e
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=8/256
    pending: wb_workfn, wb_workfn, wb_workfn, wb_workfn, wb_workfn, wb_workfn, wb_workfn, wb_workfn
workqueue kblockd: flags=0x18
  pwq 1: cpus=0 node=0 flags=0x0 nice=-20 active=1/256
    pending: blk_mq_timeout_work
workqueue dm_bufio_cache: flags=0x8
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256
    pending: work_fn