On 12/25/19 7:01 AM, Pali Rohár wrote: > Hi Jens, can you please try to look at this problem? > > On Wednesday 25 December 2019 12:05:31 Pali Rohár wrote: >> On Tuesday 24 December 2019 18:35:29 Pali Rohár wrote: >>> Hello! >>> >>> I upgraded machine with NVIDIA SATA controller (nforce4 chipse) from >>> Debian Stretch to Debian Buster and SATA disks started to have problems. >>> I booted back to Debian Stretch kernel version (having userspace >>> untouched in Buster) and everything was like before, so problem is 100% >>> kernel related. Problematic is APM support (it does not work at all), >>> HPA support (kernel show warnings at boot time) and whole booting is >>> delayed by 10 seconds. Also broken is disk speed test. >>> >>> SATA controller is using sata_nv.ko kernel driver and in lspci is >>> identified as: >>> >>> 00:07.0 IDE interface [0101]: NVIDIA Corporation CK804 Serial ATA Controller [10de:0054] (rev f3) >>> 00:08.0 IDE interface [0101]: NVIDIA Corporation CK804 Serial ATA Controller [10de:0055] (rev f3) >>> >>> Debian Stretch has kernel version (which is working fine): >>> >>> 4.9.0-11-amd64 #1 SMP Debian 4.9.189-3+deb9u2 (2019-11-11) x86_64 >>> >>> Debian Buster has kernel version (which is problematic): >>> >>> 4.19.0-6-amd64 #1 SMP Debian 4.19.67-2+deb10u2 (2019-11-11) x86_64 >>> >>> So kernel regression happened somewhere between 4.9 and 4.19 versions. >>> >>> APM on Stretch: >>> >>> $ sudo hdparm -B /dev/sda >>> >>> /dev/sda: >>> APM_level = not supported >>> >>> $ sudo hdparm -B /dev/sdb >>> >>> /dev/sdb: >>> APM_level = off >>> >>> APM on Buster: >>> >>> $ sudo hdparm -B /dev/sda >>> >>> /dev/sda: >>> SG_IO: bad/missing sense data, sb[]: f0 00 05 00 00 00 00 0a 00 aa 55 40 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >>> APM_level = not supported >>> >>> >>> $ sudo hdparm -B /dev/sdb >>> >>> /dev/sdb: >>> SG_IO: bad/missing sense data, sb[]: f0 00 05 00 00 00 00 0a 00 aa 55 40 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >>> APM_level = not supported >>> >>> /dev/sda does not support APM, but /dev/sdb supports. I do not >>> understand what above SG_IO error means, but because it works fine on >>> older kernel version, it is not hardware problem. >>> >>> Disk speed test on Stretch: >>> >>> $ sudo hdparm -Tt /dev/sda >>> >>> /dev/sda: >>> Timing cached reads: 118 MB in 2.00 seconds = 58.91 MB/sec >>> Timing buffered disk reads: 116 MB in 3.09 seconds = 37.54 MB/sec >>> >>> $ sudo hdparm -Tt /dev/sdb >>> >>> /dev/sdb: >>> Timing cached reads: 1242 MB in 2.00 seconds = 620.93 MB/sec >>> Timing buffered disk reads: 388 MB in 3.00 seconds = 129.31 MB/sec >>> >>> Disk speed test on Buster: >>> >>> $ sudo hdparm -Tt /dev/sda >>> >>> /dev/sda: >>> read() hit EOF - device too small >>> SG_IO: bad/missing sense data, sb[]: f0 00 05 00 00 00 00 0a 00 aa 55 40 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >>> Timing buffered disk reads: read() hit EOF - device too small >>> >>> $ sudo hdparm -Tt /dev/sdb >>> >>> /dev/sdb: >>> read() hit EOF - device too small >>> SG_IO: bad/missing sense data, sb[]: f0 00 05 00 00 00 00 0a 00 aa 55 40 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >>> Timing buffered disk reads: read() hit EOF - device too small >>> >>> As can be seen disk speed test is completely broken on new kernel >>> version and hdparm returns same error as for APM. >>> >>> dmesg output on Stretch: >>> >>> [ 1.716970] sata_nv 0000:00:07.0: version 3.5 >>> [ 1.717309] sata_nv 0000:00:07.0: Using ADMA mode >>> [ 1.717358] sata_nv 0000:00:07.0: Using MSI >>> [ 1.717810] scsi host0: sata_nv >>> [ 1.717954] scsi host1: sata_nv >>> [ 1.718016] ata1: SATA max UDMA/133 cmd 0x9f0 ctl 0xbf0 bmdma 0xd000 irq 20 >>> [ 1.718024] ata2: SATA max UDMA/133 cmd 0x970 ctl 0xb70 bmdma 0xd008 irq 20 >>> [ 1.718308] sata_nv 0000:00:08.0: Using ADMA mode >>> [ 1.718345] sata_nv 0000:00:08.0: Using MSI >>> [ 1.718757] scsi host2: sata_nv >>> [ 1.718886] scsi host3: sata_nv >>> [ 2.192111] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) >>> [ 2.194691] ata1.00: HPA detected: current 976771055, native 976773168 >>> [ 2.194701] ata1.00: ATA-8: WDC WD5000AADS-00S9B0, 01.00A01, max UDMA/133 >>> [ 2.194709] ata1.00: 976771055 sectors, multi 16: LBA48 NCQ (depth 31/32) >>> [ 2.199241] ata1.00: configured for UDMA/133 >>> [ 2.199501] ata1: DMA mask 0xFFFFFFFFFFFFFFFF, segment boundary 0xFFFFFFFF, hw segs 61 >>> [ 2.708030] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300) >>> [ 2.710442] ata2.00: ATA-8: TOSHIBA HDWD110, MS2OA8J0, max UDMA/133 >>> [ 2.710455] ata2.00: 1953525168 sectors, multi 16: LBA48 NCQ (depth 31/32) >>> [ 2.715066] ata2.00: configured for UDMA/133 >>> [ 2.715333] ata2: DMA mask 0xFFFFFFFFFFFFFFFF, segment boundary 0xFFFFFFFF, hw segs 61 >>> >>> dmesg output on Buster: >>> >>> [ 2.079293] sata_nv 0000:00:07.0: version 3.5 >>> [ 2.133503] sata_nv 0000:00:07.0: Using ADMA mode >>> [ 2.137138] sata_nv 0000:00:07.0: Using MSI >>> [ 2.142043] scsi host0: sata_nv >>> [ 2.174745] scsi host2: sata_nv >>> [ 2.178329] ata1: SATA max UDMA/133 cmd 0x9f0 ctl 0xbf0 bmdma 0xd000 irq 20 >>> [ 2.181675] ata2: SATA max UDMA/133 cmd 0x970 ctl 0xb70 bmdma 0xd008 irq 20 >>> [ 2.188680] sata_nv 0000:00:08.0: Using ADMA mode >>> [ 2.215676] sata_nv 0000:00:08.0: Using MSI >>> [ 2.219649] scsi host4: sata_nv >>> [ 2.226626] scsi host5: sata_nv >>> [ 2.657732] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) >>> [ 7.773692] ata1.00: qc timeout (cmd 0x27) >>> [ 7.773738] ata1.00: failed to read native max address (err_mask=0x4) >>> [ 7.773785] ata1.00: HPA support seems broken, skipping HPA handling >>> [ 8.245678] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) >>> [ 8.248009] ata1.00: ATA-8: WDC WD5000AADS-00S9B0, 01.00A01, max UDMA/133 >>> [ 8.248065] ata1.00: 976771055 sectors, multi 16: LBA48 NCQ (depth 32) >>> [ 8.252593] ata1.00: configured for UDMA/133 >>> [ 8.252964] ata1: DMA mask 0xFFFFFFFFFFFFFFFF, segment boundary 0xFFFFFFFF, hw segs 61 >>> [ 8.725693] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300) >>> [ 13.917688] ata2.00: qc timeout (cmd 0x27) >>> [ 13.920096] ata2.00: failed to read native max address (err_mask=0x4) >>> [ 13.922491] ata2.00: HPA support seems broken, skipping HPA handling >>> [ 14.393683] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300) >>> [ 14.398360] ata2.00: ATA-8: TOSHIBA HDWD110, MS2OA8J0, max UDMA/133 >>> [ 14.400813] ata2.00: 1953525168 sectors, multi 16: LBA48 NCQ (depth 32) >>> [ 14.407722] ata2.00: configured for UDMA/133 >>> [ 14.412939] ata2: DMA mask 0xFFFFFFFFFFFFFFFF, segment boundary 0xFFFFFFFF, hw segs 61 >>> >>> As can be seen new kernel has problems with handling of both SATA >>> controllers and disks HPA area. Plus before kernel prints >>> "qc timeout (cmd 0x27)" there is nothing on output, seems that kernel >>> waits until 5s timeout occur and it slow down booting by 10s. >>> >>> Do you have any idea what is happening there? What those SG_IO errors >>> or dmesg errors means? >>> >>> I'm CCing all people who touched sata_nv.c file between 4.9 and 4.19 >>> versions, so maybe somebody would know anything about this problem. >>> >>> If you need more information or other outputs, please let me know and I >>> can provide it. >> >> Now I tested also versions 4.11, 4.12, 4.13, 4.14, 4.15, 4.16, 4.17 and >> 4.18. And problem appeared only in 4.18 (all previous versions work >> fine) In 4.18 dmesg is: >> >> [ 8.596039] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300) >> [ 8.598489] ata2: illegal qc_active transition (100000000->100000001) >> [ 13.792086] ata2.00: qc timeout (cmd 0x27) >> [ 13.792122] ata2.00: failed to read native max address (err_mask=0x4) >> [ 13.792167] ata2.00: HPA support seems broken, skipping HPA handling >> [ 14.264041] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300) >> [ 14.268756] ata2.00: ATA-8: TOSHIBA HDWD110, MS2OA8J0, max UDMA/133 >> [ 14.271230] ata2.00: 1953525168 sectors, multi 16: LBA48 NCQ (depth 32) >> [ 14.278161] ata2.00: configured for UDMA/133 >> [ 14.283427] ata2: DMA mask 0xFFFFFFFFFFFFFFFF, segment boundary 0xFFFFFFFF, hw segs 61 >> >> (There is another line "illegal qc_active transition" which is not >> present in 4.19) >> >> So this problem must have been introduced during 4.18 release cycle as >> 4.17 version is working fine. > > I tried to git bisect this problem between 4.17 and 4.18. I used > following command to filter relevant libata.ko and sata_nv.ko modules: > > $ git bisect start v4.18 v4.17 -- drivers/ata/libata* drivers/ata/sata_nv.c > > And here are results: > > sata_nv.ko and libata.ko compiled from commit 804689 (libata: Fix > command retry decision) for 4.17 kernel are working fine. > > sata_nv.ko and libata.ko compiled from commit e3ed89 (libata: bump > ->qc_active to a 64-bit type) for 4.18 kernel are broken. > > So problem seems to be somehow related with introduction of hardware > tags done by Jens Axboe. Can you try with this patch: https://lore.kernel.org/linux-ide/20191213080408.27032-1-s.hauer@xxxxxxxxxxxxxx/T/#u -- Jens Axboe
