Mornin', On Sun, Sep 13, 2020 at 03:03:02PM +0900, Damien Le Moal wrote: > I tested all this. I could recreate the hang you are seeing with > CONFIG_BLK_DEV_ZONED disabled. The cause for this hang was that > good_bytes always ended up being 0 for all IOs to the host-aware disk. > The fix for this is in the first patch. > If you could test this (on top of 5.9-rc), it would be great. Thanks ! Sure, below is the diff of both boot dmesgs, with CONFIG_BLK_DEV_ZONED and without it. So for both: Tested-by: Borislav Petkov <bp@xxxxxxx> Thanks Damien and sorry for ruining your weekend. --- --- 09-rc4+.CONFIG_BLK_DEV_ZONED 2020-09-13 08:36:13.423999302 +0200 +++ 09-rc4+.CONFIG_BLK_DEV_ZONED.off 2020-09-13 08:43:45.371999496 +0200 @@ -825,28 +825,26 @@ input: DATACOMP SteelS쀁̄Љ̒DATA Cons hid-generic 0003:04B4:0101.0002: input,hidraw1: USB HID v1.00 Device [DATACOMP SteelS쀁̄Љ̒DATA] on usb-0000:03:00.0-12/input1 usb 1-13: new low-speed USB device number 3 using xhci_hcd usb 1-13: New USB device found, idVendor=046d, idProduct=c018, bcdDevice=43.01 -ata4: SATA link up 6.0 Gbps (SStatus 133 SControl 300) usb 1-13: New USB device strings: Mfr=1, Product=2, SerialNumber=0 -ata4.00: NCQ Send/Recv Log not supported usb 1-13: Product: USB Optical Mouse usb 1-13: Manufacturer: Logitech +ata4: SATA link up 6.0 Gbps (SStatus 133 SControl 300) +ata4.00: NCQ Send/Recv Log not supported ata4.00: ATA-10: ST8000AS0022-1WL17Z, SN01, max UDMA/133 -ata4.00: 15628053168 sectors, multi 16: LBA48 NCQ (depth 32), AA input: Logitech USB Optical Mouse as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-13/1-13:1.0/0003:046D:C018.0003/input/input5 +ata4.00: 15628053168 sectors, multi 16: LBA48 NCQ (depth 32), AA ata4.00: NCQ Send/Recv Log not supported hid-generic 0003:046D:C018.0003: input,hidraw2: USB HID v1.11 Mouse [Logitech USB Optical Mouse] on usb-0000:03:00.0-13/input0 ata4.00: configured for UDMA/133 scsi 3:0:0:0: Direct-Access ATA ST8000AS0022-1WL SN01 PQ: 0 ANSI: 5 sd 3:0:0:0: Attached scsi generic sg1 type 0 -sd 3:0:0:0: [sdb] Host-aware zoned block device +sd 3:0:0:0: [sdb] Host-aware SMR disk used as regular disk sd 3:0:0:0: [sdb] 15628053168 512-byte logical blocks: (8.00 TB/7.28 TiB) sd 3:0:0:0: [sdb] 4096-byte physical blocks sd 3:0:0:0: [sdb] Write Protect is off sd 3:0:0:0: [sdb] Mode Sense: 00 3a 00 00 sd 3:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA -sd 3:0:0:0: [sdb] 29808 zones of 524288 logical blocks + 1 runt zone sdb: sdb1 -sdb: disabling host aware zoned block device support due to partitions sd 3:0:0:0: [sdb] Attached SCSI disk ata5: failed to resume link (SControl 0) ata5: SATA link down (SStatus 0 SControl 0) -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette