BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 164s! Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=3/256 in-flight: 11842:free_obj_work pending: free_obj_work, vmpressure_work_fn pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 pending: vmstat_shepherd workqueue events_long: flags=0x0 pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 pending: gc_worker workqueue events_power_efficient: flags=0x80 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256 pending: check_lifetime, neigh_periodic_work pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 pending: neigh_periodic_work workqueue mm_percpu_wq: flags=0x8 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 pending: vmstat_update pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 pending: vmstat_update workqueue writeback: flags=0x4e pwq 4: cpus=0-1 flags=0x4 nice=0 active=2/256 in-flight: 24584:wb_workfn wb_workfn ======================================================