BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 31s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=7/256 refcnt=8
    in-flight: 14:p9_poll_workfn
    pending: p9_poll_workfn, p9_read_work, kfree_rcu_monitor, vmstat_shepherd, psi_avgs_work, reg_todo
workqueue events_unbound: flags=0x2
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=4/512 refcnt=6
    in-flight: 470:fsnotify_mark_destroy_workfn fsnotify_mark_destroy_workfn, 39:fsnotify_connector_destroy_workfn fsnotify_connector_destroy_workfn
workqueue rcu_gp: flags=0x8
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256 refcnt=3
    pending: srcu_invoke_callbacks, process_srcu
workqueue dm_bufio_cache: flags=0x8
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: work_fn
pool 0: cpus=0 node=0 flags=0x0 nice=0 hung=31s workers=4 idle: 3811 4313 7
pool 4: cpus=0-1 flags=0x4 nice=0 hung=0s workers=6 idle: 56 9 429 11