BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 158s!
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 158s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: ovs_dp_masks_rebalance
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256 refcnt=3
    pending: vmstat_shepherd, psi_avgs_work
workqueue events_long: flags=0x0
  pwq 0: cpus=0 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=2/512 refcnt=3
    pending: toggle_allocation_gate, crng_reseed
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/512 refcnt=2
    pending: flush_memcg_stats_dwork
workqueue events_freezable: flags=0x4
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: update_balloon_stats_func
workqueue events_power_efficient: flags=0x80
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=3/256 refcnt=4
    pending: gc_worker, reg_check_chans_work, check_lifetime
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=5/256 refcnt=6
    pending: 2*neigh_managed_work, 2*neigh_periodic_work, do_cache_clean
workqueue mm_percpu_wq: flags=0x8
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: vmstat_update
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: vmstat_update
workqueue writeback: flags=0x4a
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/256 refcnt=2
    pending: wb_workfn
workqueue kblockd: flags=0x18
  pwq 1: cpus=0 node=0 flags=0x0 nice=-20 active=1/256 refcnt=2
    pending: blk_mq_timeout_work
workqueue dm_bufio_cache: flags=0x8
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: work_fn
workqueue ipv6_addrconf: flags=0xe000a
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/1 refcnt=4
    pending: addrconf_verify_work
workqueue krxrpcd: flags=0xa001a
  pwq 5: cpus=0-1 node=0 flags=0x4 nice=-20 active=1/1 refcnt=4
    pending: rxrpc_peer_keepalive_worker
Showing backtraces of running workers in stalled CPU-bound worker pools: