On Mon, Aug 20, 2018 at 06:15:10PM +0800, Ming Lei wrote: > On Mon, Aug 20, 2018 at 11:56:26AM +0200, Ricardo Ribalda Delgado wrote: > > Hi > > On Mon, Aug 20, 2018 at 11:55 AM Ming Lei <ming.lei@xxxxxxxxxx> wrote: > > > > > > On Mon, Aug 20, 2018 at 11:04:08AM +0200, Ricardo Ribalda Delgado wrote: > > > > Hello Ming > > > > On Mon, Aug 20, 2018 at 10:30 AM Ming Lei <ming.lei@xxxxxxxxxx> wrote: > > > > > > > > > > On Mon, Aug 20, 2018 at 09:39:45AM +0200, Ricardo Ribalda Delgado wrote: > > > > > > Some measurements: > > > > > > > > > > > > Please note that even when iostat shows 0.0 the LED on the device was > > > > > > blinking as if there was some activity going on. > > > > > > > > > > > > Thanks! > > > > > > > > > > > > KERNEL: > > > > > > Linux neopili 4.17.0-1-amd64 #1 SMP Debian 4.17.8-1 (2018-07-20) > > > > > > x86_64 GNU/Linux > > > > > > > > > > > > DISK: > > > > > > [247530.712686] usb 2-2: new SuperSpeed USB device number 3 using xhci_hcd > > > > > > [247530.738906] usb 2-2: New USB device found, idVendor=174c, > > > > > > idProduct=5136, bcdDevice= 1.00 > > > > > > [247530.738913] usb 2-2: New USB device strings: Mfr=2, Product=3, > > > > > > SerialNumber=1 > > > > > > [247530.738918] usb 2-2: Product: 91686 > > > > > > [247530.738921] usb 2-2: Manufacturer: Delock > > > > > > [247530.738925] usb 2-2: SerialNumber: 300000003B45 > > > > > > [247530.750709] scsi host6: uas > > > > > > [247530.751377] scsi 6:0:0:0: Direct-Access ASMT 2105 > > > > > > 0 PQ: 0 ANSI: 6 > > > > > > [247530.752174] sd 6:0:0:0: Attached scsi generic sg2 type 0 > > > > > > [247530.752616] sd 6:0:0:0: [sdb] 31277232 512-byte logical blocks: > > > > > > (16.0 GB/14.9 GiB) > > > > > > [247530.752740] sd 6:0:0:0: [sdb] Write Protect is off > > > > > > [247530.752742] sd 6:0:0:0: [sdb] Mode Sense: 43 00 00 00 > > > > > > [247530.752905] sd 6:0:0:0: [sdb] Write cache: enabled, read cache: > > > > > > enabled, doesn't support DPO or FUA > > > > > > [247530.755912] sdb: sdb1 sdb2 > > > > > > [247530.756832] sd 6:0:0:0: [sdb] Attached SCSI disk > > > > > > > > > > > > > > > > > > TL/DR: > > > > > > CFQ: 21.7 > > > > > > NOOP: 21.7 > > > > > > DEADLINE: 21.7 > > > > > > MQ-DEADLINE: 175.2 > > > > > > NONE: 236.4 > > > > > > KYBER: 174.9 > > > > > > > > > > Thanks for your test! > > > > > > > > > > One problem found from your iostat log is that looks there is ~30sec > > > > > idle period between IO activities when blk-mq is enabled. > > > > > > > > During all the test the LED on the device was blinking. > > > > > > > > But a closer look to dmesg reveals a lot of this messages: > > > > > > > > [ 196.929811] sd 6:0:0:0: [sdb] tag#3 data cmplt err -71 uas-tag 1 > > > > inflight: CMD > > > > > > -71 is -EPROTO, which is returned from xhci driver, usually it means > > > there is error from the USB device side. > > > > > > > [ 196.929822] sd 6:0:0:0: [sdb] tag#3 CDB: Write(10) 2a 00 00 04 00 > > > > 68 00 04 00 00 > > > > [ 227.764379] sd 6:0:0:0: [sdb] tag#4 uas_eh_abort_handler 0 uas-tag > > > > 2 inflight: CMD OUT > > > > [ 227.764389] sd 6:0:0:0: [sdb] tag#4 CDB: Write(10) 2a 00 00 04 04 > > > > 68 00 04 00 00 > > > > [ 227.766555] sd 6:0:0:0: [sdb] tag#3 uas_eh_abort_handler 0 uas-tag > > > > 1 inflight: CMD > > > > [ 227.766562] sd 6:0:0:0: [sdb] tag#3 CDB: Write(10) 2a 00 00 04 00 > > > > 68 00 04 00 00 > > > > [ 227.784312] scsi host6: uas_eh_device_reset_handler start > > > > [ 227.913672] usb 2-2: reset SuperSpeed USB device number 3 using xhci_hcd > > > > [ 227.944842] scsi host6: uas_eh_device_reset_handler success > > > > [ 231.416133] sd 6:0:0:0: [sdb] tag#1 data cmplt err -71 uas-tag 10 > > > > inflight: CMD > > > > [ 231.416147] sd 6:0:0:0: [sdb] tag#1 CDB: Write(10) 2a 00 00 06 d5 > > > > e8 00 04 00 00 > > > > > > > > And they take around 30 secons (227-196) > > > > > > > > > > > > Maybe this is a hw issue? I will bring the reader home tonight and see > > > > if I can replicate the bug with my notebook > > > > > > It might be. > > > > > > Is there such message in case of non-blk-mq? > > > > No, only with blk-mq > > OK, seems something doesn't work as expected in either scsi_mq or uas > driver. Maybe it is just an uas issue, since I can reproduce the following issue with either scsi_mq or not on v4.18, and the uas is emulated via qemu. [ 116.988843] sd 3:0:0:0: [sde] tag#10 uas_eh_abort_handler 0 uas-tag 9 inflight: CMD OUT [ 116.988859] sd 3:0:0:0: [sde] tag#10 CDB: Write(10) 2a 00 0d d9 ec 08 00 00 08 00 [ 116.991121] sd 3:0:0:0: [sde] tag#12 uas_eh_abort_handler 0 uas-tag 1 inflight: [ 116.991129] sd 3:0:0:0: [sde] tag#12 CDB: Write(10) 2a 00 0d d9 35 b0 00 00 08 00 [ 116.991136] sd 3:0:0:0: [sde] tag#2 uas_eh_abort_handler 0 uas-tag 8 inflight: [ 116.991140] sd 3:0:0:0: [sde] tag#2 CDB: Write(10) 2a 00 0d 9c 7f b8 00 00 08 00 [ 116.991146] sd 3:0:0:0: [sde] tag#5 uas_eh_abort_handler 0 uas-tag 7 inflight: [ 116.991149] sd 3:0:0:0: [sde] tag#5 CDB: Write(10) 2a 00 0d 87 0d c8 00 00 08 00 [ 116.991155] sd 3:0:0:0: [sde] tag#9 uas_eh_abort_handler 0 uas-tag 14 inflight: [ 116.991158] sd 3:0:0:0: [sde] tag#9 CDB: Write(10) 2a 00 0d 84 fa b0 00 00 08 00 [ 116.991163] sd 3:0:0:0: [sde] tag#6 uas_eh_abort_handler 0 uas-tag 6 inflight: [ 116.991167] sd 3:0:0:0: [sde] tag#6 CDB: Write(10) 2a 00 0d 5b f2 e0 00 00 08 00 [ 116.991173] sd 3:0:0:0: [sde] tag#13 uas_eh_abort_handler 0 uas-tag 5 inflight: [ 116.991176] sd 3:0:0:0: [sde] tag#13 CDB: Write(10) 2a 00 0d 27 dd a0 00 00 08 00 [ 116.991181] sd 3:0:0:0: [sde] tag#8 uas_eh_abort_handler 0 uas-tag 13 inflight: [ 116.991185] sd 3:0:0:0: [sde] tag#8 CDB: Write(10) 2a 00 0d 14 03 08 00 00 08 00 [ 116.991190] sd 3:0:0:0: [sde] tag#11 uas_eh_abort_handler 0 uas-tag 2 inflight: [ 116.991194] sd 3:0:0:0: [sde] tag#11 CDB: Write(10) 2a 00 0c f8 10 d0 00 00 08 00 [ 116.991199] sd 3:0:0:0: [sde] tag#0 uas_eh_abort_handler 0 uas-tag 12 inflight: [ 116.991203] sd 3:0:0:0: [sde] tag#0 CDB: Write(10) 2a 00 0c f7 5f 00 00 00 08 00 [ 116.991208] sd 3:0:0:0: [sde] tag#7 uas_eh_abort_handler 0 uas-tag 4 inflight: [ 116.991211] sd 3:0:0:0: [sde] tag#7 CDB: Write(10) 2a 00 0c c1 7d 98 00 00 08 00 [ 116.996641] scsi host3: uas_eh_device_reset_handler start [ 117.112534] usb 3-1: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd [ 117.128255] scsi host3: uas_eh_device_reset_handler success [ming@VM]$ [ming@VM]$ [ming@VM]$cat /proc/cmdline ftrace_dump_on_oops root=UUID=a2850628-61dd-42ee-8081-5f482a65314a ro console=tty1 console=ttyS0,115200n8 earlyprintk rootfstype=ext4 rw loglevel=9 virtio_blk.queue_depth=128 scsi_mod.use_blk_mq=0 no_console_suspend dm_mod.use_blk_mq=1 ip=dhcp iommu=force intel_iommu=on hugepages=0 debug kmemleak=off scsi_transport_iscsi.debug_session=1 scsi_transport_iscsi.debug_conn=1 thanks, Ming
