BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 42s!
Showing busy workqueues and worker pools:
workqueue mm_percpu_wq: flags=0x8
  pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=1 refcnt=2
    pending: vmstat_update
Showing backtraces of running workers in stalled CPU-bound worker pools: