Warning: block/blk-core.c:2656 blk_update_request

Issue

• Warning seen in logs:

Nov 23 03:52:10 localhost kernel: WARNING: CPU: 17 PID: 0 at block/blk-core.c:2656 blk_update_request+0x5a8/0x5b0
Nov 23 03:52:10 localhost kernel: Modules linked in: binfmt_misc vfat fat xfs fcoe libfcoe libfc scsi_transport_fc ast i2c_algo_bit ttm drm_kms_helper at24 nvmem_core drm fb_sys_fops syscopy
area ses sysfillrect enclosure sysimgblt scsi_transport_sas sg ofpart i2c_opal powernv_flash shpchp ipmi_powernv opal_prd ipmi_devintf i2c_core mtd uio_pdrv_genirq ipmi_msghandler uio ext4 j
bd2 mbcache loop nls_utf8 isofs sr_mod cdrom uas usb_storage sd_mod i40e aacraid ptp pps_core sunrpc xts lrw gf128mul dm_crypt dm_round_robin dm_multipath dm_snapshot dm_bufio dm_mirror dm_r
egion_hash dm_log dm_zero dm_mod linear raid10 raid456 async_raid6_recov async_memcpy libcrc32c async_pq async_xor xor async_tx raid6_pq raid1 raid0 iscsi_tcp libiscsi_tcp libiscsi scsi_tran
sport_iscsi squashfs cramfs ctr(E)
Nov 23 03:52:10 localhost kernel: CPU: 17 PID: 0 Comm: swapper/17 Tainted: G            E  ------------   4.11.0-44.el7a.ppc64le #1
Nov 23 03:52:10 localhost kernel: task: c00000078d625200 task.stack: c00000078d6ec000
Nov 23 03:52:10 localhost kernel: NIP: c0000000005f3b08 LR: c0000000005f3828 CTR: c0000000005fb9b0
Nov 23 03:52:10 localhost kernel: REGS: c00000000ff73890 TRAP: 0700   Tainted: G            E  ------------    (4.11.0-44.el7a.ppc64le)
Nov 23 03:52:10 localhost kernel: MSR: 9000000000029033 <SF,HV,EE,ME,IR,DR,RI,LE>
Nov 23 03:52:10 localhost kernel:   CR: 48042882  XER: 00000000
Nov 23 03:52:10 localhost kernel: CFAR: c0000000005f38f4 SOFTE: 1 
                                  GPR00: c0000000005f3828 c00000000ff73b10 c000000001403100 c00000076f821b00 
                                  GPR04: 0000000000000000 0000000000000000 c000000001373100 0000000000000001 
                                  GPR08: 0000000000047087 0000000000000000 c00000076f821b00 c008000008b79460 
                                  GPR12: 0000000000004000 c00000000fb4a180 0000000000200042 00000000fffffdaf 
                                  GPR16: c00000000ff70000 0000000000000000 c000000000fe4080 c000000001433b00 
                                  GPR20: c000000000fe4080 000000000000000a 0000000000000005 0000000000000bb8 
                                  GPR24: 0000000008100002 0000000000000000 0000000000000000 0000000000000000 
                                  GPR28: 0000000000000000 c00000076f821b00 0000000000000000 c00000076f80d800 
Nov 23 03:52:10 localhost kernel: NIP [c0000000005f3b08] blk_update_request+0x5a8/0x5b0
Nov 23 03:52:10 localhost kernel: LR [c0000000005f3828] blk_update_request+0x2c8/0x5b0
Nov 23 03:52:10 localhost kernel: Call Trace:
Nov 23 03:52:10 localhost kernel: [c00000000ff73b10] [c0000000005f3828] blk_update_request+0x2c8/0x5b0 (unreliable)
Nov 23 03:52:10 localhost kernel: [c00000000ff73ba0] [c00000000083b2ec] scsi_end_request+0x6c/0x2c0
Nov 23 03:52:10 localhost kernel: [c00000000ff73c00] [c00000000083e004] scsi_io_completion+0x204/0x9d0
Nov 23 03:52:10 localhost kernel: [c00000000ff73cc0] [c00000000082ed4c] scsi_finish_command+0x10c/0x1b0
Nov 23 03:52:10 localhost kernel: [c00000000ff73d40] [c00000000083b948] scsi_softirq_done+0x198/0x200
Nov 23 03:52:10 localhost kernel: [c00000000ff73dc0] [c000000000604d20] blk_done_softirq+0xd0/0x100
Nov 23 03:52:10 localhost kernel: [c00000000ff73e00] [c00000000012f9b4] __do_softirq+0x164/0x420
Nov 23 03:52:10 localhost kernel: [c00000000ff73ef0] [c0000000001301b4] irq_exit+0x1e4/0x1f0
Nov 23 03:52:10 localhost kernel: [c00000000ff73f20] [c0000000000167e0] __do_irq+0xa0/0x200
Nov 23 03:52:10 localhost kernel: [c00000000ff73f90] [c00000000002d510] call_do_irq+0x14/0x24
Nov 23 03:52:10 localhost kernel: [c00000078d6efaa0] [c0000000000169e0] do_IRQ+0xa0/0x120
Nov 23 03:52:10 localhost kernel: [c00000078d6efb00] [c000000000009a74] h_virt_irq_common+0x114/0x120
Nov 23 03:52:10 localhost kernel: --- interrupt: ea1 at arch_local_irq_restore+0x68/0x130
                                      LR = cpuidle_enter_state+0x114/0x450
Nov 23 03:52:10 localhost kernel: [c00000078d6efdf0] [c000000000992a3c] cpuidle_enter_state+0xec/0x450 (unreliable)
Nov 23 03:52:10 localhost kernel: [c00000078d6efe50] [c0000000001a6c60] do_idle+0x350/0x3e0
Nov 23 03:52:10 localhost kernel: [c00000078d6efef0] [c0000000001a6f58] cpu_startup_entry+0x38/0x40
Nov 23 03:52:10 localhost kernel: [c00000078d6eff20] [c000000000053074] start_secondary+0x314/0x370
Nov 23 03:52:10 localhost kernel: [c00000078d6eff90] [c00000000000a96c] start_secondary_prolog+0x10/0x14
Nov 23 03:52:10 localhost kernel: Instruction dump:
Nov 23 03:52:10 localhost kernel: 61290040 b13d0018 4bfffd3c 3cc2ff9d 38c64620 4bfffb68 3cc2fff7 88e666f1 
Nov 23 03:52:10 localhost kernel: 2f870000 40fefdfc 38e00001 98e666f1 <0fe00000> 4bfffdec 3c4c00e1 3842f5f0 

• Also, 'Write Same' failures seen:

Nov 23 03:52:10 localhost kernel: sd 0:2:14:0: [sda] tag#8 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Nov 23 03:52:10 localhost kernel: sd 0:2:14:0: [sda] tag#8 Sense Key : Illegal Request [current] 
Nov 23 03:52:10 localhost kernel: sd 0:2:14:0: [sda] tag#8 Add. Sense: Invalid field in cdb
Nov 23 03:52:10 localhost kernel: sd 0:2:14:0: [sda] tag#8 CDB: Write same(16) 93 08 00 00 00 00 03 a0 27 f9 00 40 00 07 00 00
Nov 23 03:52:10 localhost kernel: blk_update_request: critical target error, dev sda, sector 60827641
Nov 23 03:52:10 localhost kernel: sd 0:2:14:0: [sda] tag#7 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Nov 23 03:52:10 localhost kernel: sd 0:2:14:0: [sda] tag#7 Sense Key : Illegal Request [current] 
Nov 23 03:52:10 localhost kernel: sd 0:2:14:0: [sda] tag#7 Add. Sense: Invalid field in cdb
Nov 23 03:52:10 localhost kernel: sd 0:2:14:0: [sda] tag#7 CDB: Write same(16) 93 08 00 00 00 00 03 20 27 fa 00 7f ff ff 00 00
Nov 23 03:52:10 localhost kernel: blk_update_request: critical target error, dev sda, sector 52439034
Nov 23 03:52:10 localhost kernel: sd 0:2:14:0: [sda] tag#6 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Nov 23 03:52:10 localhost kernel: sd 0:2:14:0: [sda] tag#6 Sense Key : Illegal Request [current] 
Nov 23 03:52:10 localhost kernel: sd 0:2:14:0: [sda] tag#6 Add. Sense: Invalid field in cdb
Nov 23 03:52:10 localhost kernel: sd 0:2:14:0: [sda] tag#6 CDB: Write same(16) 93 08 00 00 00 00 02 a0 27 fb 00 7f ff ff 00 00