BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 59s! BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 59s! BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=-20 stuck for 55s! BUG: workqueue lockup - pool cpus=0-1 flags=0x4 nice=0 stuck for 59s! Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256 pending: perf_sched_delayed, cache_reap pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256 pending: vmstat_shepherd, cache_reap, check_corruption workqueue events_unbound: flags=0x2 pwq 4: cpus=0-1 flags=0x4 nice=0 active=6/512 in-flight: 114:call_usermodehelper_exec_work, 3390:call_usermodehelper_exec_work, 3373:call_usermodehelper_exec_work, 3378:call_usermodehelper_exec_work, 3406:call_usermodehelper_exec_work pending: flush_to_ldisc workqueue events_power_efficient: flags=0x80 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256 pending: gc_worker, neigh_periodic_work pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=2/256 pending: do_cache_clean, 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=1/256 pending: wb_workfn workqueue kblockd: flags=0x18 pwq 3: cpus=1 node=0 flags=0x0 nice=-20 active=1/256 pending: blk_timeout_work pool 4: cpus=0-1 flags=0x4 nice=0 hung=59s workers=9 idle: 3375 21 5 70