On 4/9/19 1:13 PM, Stewart Smith wrote: > cpu 0x4a: Vector: 400 (Instruction Access) at [c000203ff398b100] > pc: c0000000021fe700 > lr: c0000000002001d8: blk_mq_complete_request+0x34/0x138 Would you please figure out what is the source code here with gdb ? >From the backtrace, it seems not the same issue, because no dm-mpath is involved here. Thanks Jianchao > sp: c000203ff398b390 > msr: 9000000010009033 > current = 0xc000203ff3901b00 > paca = 0xc000203fff7f3680 irqmask: 0x03 irq_happened: 0x01 > pid = 658, comm = kworker/u257:2 > Linux version 5.0.7-openpower1 (hostboot@xxxxxxxxxxxxxxxxxxxxxxxxxx) (gcc version 6.5.0 (Buildroot 2019.02.1-00016-ge01dcd0)) #2 SMP Mon Apr 8 09:14:53 CDT 2019 > > [link register ] c0000000002001d8 blk_mq_complete_request+0x34/0x138 > [c000203ff398b390] c000203ff398b3d0 (unreliable) > [c000203ff398b3d0] c0000000002d0428 scsi_mq_done+0x48/0x6c > [c000203ff398b410] c0000000002ee8d8 ata_scsi_simulate+0x78/0x29c > [c000203ff398b460] c0000000002eee74 ata_scsi_queuecmd+0xa8/0x2cc > [c000203ff398b4a0] c0000000002d2ac4 scsi_queue_rq+0x7bc/0x810 > [c000203ff398b540] c000000000202570 blk_mq_dispatch_rq_list+0x474/0x5c0 > [c000203ff398b600] c000000000207560 blk_mq_sched_dispatch_requests+0x114/0x18c > [c000203ff398b660] c0000000002009e4 __blk_mq_run_hw_queue+0xe0/0xf8 > [c000203ff398b6e0] c000000000200a5c __blk_mq_delay_run_hw_queue+0x60/0x184 > [c000203ff398b740] c000000000200c20 blk_mq_run_hw_queue+0x70/0xe4 > [c000203ff398b790] c0000000002077ec blk_mq_sched_insert_request+0x68/0x194 > [c000203ff398b7f0] c0000000001fc1d8 blk_execute_rq_nowait+0x78/0x8c > [c000203ff398b810] c0000000001fc234 blk_execute_rq+0x48/0x90 > [c000203ff398b860] c0000000002cfa10 __scsi_execute+0xd8/0x1ac > [c000203ff398b8d0] c0000000002cc31c ioctl_internal_command.constprop.2+0x50/0x144 > [c000203ff398b980] c0000000002cc474 scsi_set_medium_removal+0x64/0x9c > [c000203ff398b9c0] c0080000101f2754 sd_open+0xe8/0x148 [sd_mod] > [c000203ff398ba00] c00000000018b730 __blkdev_get+0x198/0x3e4 > [c000203ff398ba70] c00000000018b9cc blkdev_get+0x50/0x35c > [c000203ff398bb10] c00000000020b140 __device_add_disk+0x468/0x488 > [c000203ff398bbd0] c0080000101f5484 sd_probe_async+0xd4/0x180 [sd_mod] > [c000203ff398bc60] c00000000009a128 async_run_entry_fn+0x68/0x138 > [c000203ff398bca0] c000000000090858 process_one_work+0x204/0x334 > [c000203ff398bd30] c000000000090ca4 worker_thread+0x2d0/0x394 > [c000203ff398bdb0] c000000000096cb4 kthread+0x14c/0x154 > [c000203ff398be20] c00000000000b72c ret_from_kernel_thread+0x5c/0x70
