Buffer I/O error on dev loop3, logical block 7, lost async page write blk_update_request: I/O error, dev loop3, sector 64 Buffer I/O error on dev loop3, logical block 8, lost async page write blk_update_request: I/O error, dev loop3, sector 72 Buffer I/O error on dev loop3, logical block 9, lost async page write BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 45s! BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=-20 stuck for 35s! Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256 pending: vmstat_shepherd, defense_work_handler workqueue kblockd: flags=0x18 pwq 3: cpus=1 node=0 flags=0x0 nice=-20 active=1/256 pending: blk_mq_requeue_work workqueue vmstat: flags=0xc pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 pending: vmstat_update