BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 36s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x100
  pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=21 refcnt=22
    in-flight: 4831:nsim_fib_event_work for 122s
    pending: psi_avgs_work, vmstat_shepherd, 3*psi_avgs_work, 6*ovs_dp_masks_rebalance, 9*nsim_dev_hwstats_traffic_work
workqueue events_long: flags=0x100
  pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=6 refcnt=7