[ Regressions ] linux next 20201008: blk_update_request: I/O error, dev sda, sector 0 op 0x1:(WRITE) flags 0x800 phys_seg 0 prio class 0

Naresh Kamboju
2020-10-08T18:11:46Z

There are two major regressions noticed on linux next tag 20201008.
I will bisect this problem and get back to you.

1) qemu_i386 and qemu_x86 boot failed due to mount rootfs failing [1].

Starting Remount Root and Kernel File Systems...
[ 1.750740] ata1.00: WARNING: zero len r/w req
[ 1.751423] ata1.00: WARNING: zero len r/w req
[ 1.752361] ata1.00: WARNING: zero len r/w req
[ 1.753400] ata1.00: WARNING: zero len r/w req
[ 1.754447] ata1.00: WARNING: zero len r/w req
[ 1.755529] ata1.00: WARNING: zero len r/w req
[ 1.756630] sd 0:0:0:0: [sda] tag#0 FAILED Result:
hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s
[ 1.758622] sd 0:0:0:0: [sda] tag#0 CDB: Synchronize Cache(10) 35
00 00 00 00 00 00 00 00 00
[ 1.760576] blk_update_request: I/O error, dev sda, sector 0 op
0x1:(WRITE) flags 0x800 phys_seg 1 prio class 0
[ 1.761534] Buffer I/O error on dev sda, logical block 0, lost sync
page write
[ 1.764158] EXT4-fs (sda): I/O error while writing superblock

2) the devices boot pass but mkfs failed on x86_64, i386, arm64
Juno-r2 devices [2].

mkfs -t ext4 /dev/disk/by-id/ata-TOSHIBA_MG03ACA100_37O9KGL0F
[ 72.159789] ata3.00: WARNING: zero len r/w req
[ 72.164287] ata3.00: WARNING: zero len r/w req
[ 72.168774] ata3.00: WARNING: zero len r/w req
[ 72.168777] ata3.00: WARNING: zero len r/w req
[ 72.168779] ata3.00: WARNING: zero len r/w req
[ 72.168781] ata3.00: WARNING: zero len r/w req
[ 72.168786] sd 2:0:0:0: [sda] tag#5 FAILED Result:
hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=0s
[ 72.168788] sd 2:0:0:0: [sda] tag#5 CDB: Synchronize Cache(10) 35
00 00 00 00 00 00 00 00 00
[ 72.168791] blk_update_request: I/O error, dev sda, sector 0 op
0x1:(WRITE) flags 0x800 phys_seg 0 prio class 0

Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>

metadata:
git branch: master
git repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
git commit: e4fb79c771fbe2e6fcb3cffa87d5823a9bbf3f10
git describe: next-20201008
make_kernelversion: 5.9.0-rc8
kernel-config:
https://builds.tuxbuild.com/pOW-FELX2VUycejkuyiKZg/kernel.config

steps to reproduce:
--------------------------
1) qemu boot command:

/usr/bin/qemu-system-x86_64 -cpu host -enable-kvm -nographic -net
nic,model=virtio,macaddr=DE:AD:BE:EF:66:06 -net tap -m 1024 -monitor
none -kernel bzImage --append "root=/dev/sda rootwait
console=ttyS0,115200" -hda
rpb-console-image-lkft-intel-corei7-64-20200723162342-41.rootfs.ext4
-m 4096 -smp 4 -nographic

2) boot x86_64 with linux next 20201008 tag kernel and attach SDD drive.

mkfs -t ext4 /dev/<drive-partition>

Full log links,
[1 ]https://lkft.validation.linaro.org/scheduler/job/1823906#L688
[2] https://lkft.validation.linaro.org/scheduler/job/1823938#L2065

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Linaro LKFT