EXT4-fs (loop4): VFS: Can't find ext4 filesystem EXT4-fs (loop4): VFS: Can't find ext4 filesystem BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 248s! BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=-20 stuck for 248s! Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 pending: vmstat_shepherd pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 in-flight: 4:linkwatch_event workqueue events_highpri: flags=0x10 pwq 3: cpus=1 node=0 flags=0x0 nice=-20 active=1/256 pending: flush_backlog BAR(23282) workqueue events_power_efficient: flags=0x80 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=3/256 pending: gc_worker, ioc_release_fn, neigh_periodic_work workqueue ipv6_addrconf: flags=0x40008 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/1 pending: addrconf_verify_work pool 0: cpus=0 node=0 flags=0x0 nice=0 hung=0s workers=4 idle: 23 7450 11471