BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 32s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=6/256 refcnt=7
    in-flight: 4040:p9_poll_workfn p9_poll_workfn
    pending: p9_read_work, ovs_dp_masks_rebalance, reg_todo, kfree_rcu_monitor
workqueue events_long: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: defense_work_handler
workqueue events_unbound: flags=0x2
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/512 refcnt=3
    in-flight: 176:toggle_allocation_gate
workqueue mm_percpu_wq: flags=0x8
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: vmstat_update
workqueue krxrpcd: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1 refcnt=2
    pending: rxrpc_peer_keepalive_worker
pool 2: cpus=1 node=0 flags=0x0 nice=0 hung=32s workers=4 idle: 1517 24 22
pool 4: cpus=0-1 flags=0x4 nice=0 hung=0s workers=6 idle: 39 461 9 190 11