BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 48s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x100
  pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=23 refcnt=24
    in-flight: 9:reg_todo for 48s
    pending: 4*ovs_dp_masks_rebalance, drm_fb_helper_damage_work, 5*nsim_dev_hwstats_traffic_work, 4*psi_avgs_work, vmstat_shepherd, 2*ovs_dp_masks_rebalance, psi_avgs_work, free_obj_work, 3*l2cap_chan_timeout