Description of problem:

Emulate one fault disk, it will delay IO about 5 minutes.

Pass-through the disk to vm and boot it. The vm boot slowly.

The disk can be found in disk management after boot.




Version-Release number of selected component (if applicable):

Red Hat Enterprise Linux release 9.0 Beta (Plow)
5.14.0-1.7.1.el9.x86_64
qemu-kvm-6.1.0-8.el9.x86_64
seabios-bin-1.14.0-6.el9.noarch
edk2-ovmf-20210527gite1999b264f1f-6.el9.noarch
virtio-win-prewhql-0.1-214.iso

(qemu-kvm-6.0.0-13.el9_b.5.x86_64 same result)

How reproducible:
100%

Steps to Reproduce:
1. emulate fault disk

1.1 create scsi_debug disk ==>/dev/sdb
modprobe scsi_debug  dev_size_mb=128

1.2 create dm disk with fault sector ==> /dev/mapper/baddisk

dmsetup create baddisk << EOF
0 160000 linear /dev/sdd 0
160000 5 delay /dev/sdd 160000 0 /dev/sdd 160000 300000
160005 80000 linear /dev/sdd 160005
EOF

1.3 export the dm disk 
(workspace) root@dell-per440-07 /home/vbugs $ targetcli ls
o- / ..................................................................... [...]
  o- backstores .......................................................... [...]
  | o- block .............................................. [Storage Objects: 1]
  | | o- device.baddisk .. [/dev/mapper/baddisk (117.2MiB) write-thru activated]
  | |   o- alua ............................................... [ALUA Groups: 1]
  | |     o- default_tg_pt_gp ................... [ALUA state: Active/optimized]
  | o- fileio ............................................. [Storage Objects: 0]
  | o- pscsi .............................................. [Storage Objects: 0]
  | o- ramdisk ............................................ [Storage Objects: 0]
  o- iscsi ........................................................ [Targets: 1]
  | o- iqn.2019-12.com.redhat:kvm-qe ................................. [TPGs: 1]
  |   o- tpg1 .............................................. [gen-acls, no-auth]
  |     o- acls ...................................................... [ACLs: 0]
  |     o- luns ...................................................... [LUNs: 1]
  |     | o- lun0  [block/device.baddisk (/dev/mapper/baddisk) (default_tg_pt_gp)]
  |     o- portals ................................................ [Portals: 1]
  |       o- 0.0.0.0:3260 ................................................. [OK]
  o- loopback ..................................................... [Targets: 0]

1.4 attach the iscsi disk ==> sde



lsblk:
sdd                              8:48   0   128M  0 disk 
 --baddisk                      253:3    0 117.2M  0 dm   
sde                              8:64   0 117.2M  0 disk


2.pass-through the disk and boot it
/usr/libexec/qemu-kvm \
    -name 'avocado-vt-vm1'  \
    -sandbox on  \
    -machine pc,memory-backend=mem-machine_mem  \
    -nodefaults \
    -device VGA,bus=pci.0,addr=0x2 \
    -m 30720 \
    -object memory-backend-ram,size=30720M,id=mem-machine_mem  \
    -smp 10,maxcpus=10,cores=5,threads=1,dies=1,sockets=2  \
    -cpu 'Cascadelake-Server-noTSX',hv_stimer,hv_synic,hv_vpindex,hv_relaxed,hv_spinlocks=0x1fff,hv_vapic,hv_time,hv_frequencies,hv_runtime,hv_tlbflush,hv_reenlightenment,hv_stimer_direct,hv_ipi,+kvm_pv_unhalt \
    \
    -device ich9-usb-ehci1,id=usb1,addr=0x1d.0x7,multifunction=on,bus=pci.0 \
    -device ich9-usb-uhci1,id=usb1.0,multifunction=on,masterbus=usb1.0,addr=0x1d.0x0,firstport=0,bus=pci.0 \
    -device ich9-usb-uhci2,id=usb1.1,multifunction=on,masterbus=usb1.0,addr=0x1d.0x2,firstport=2,bus=pci.0 \
    -device ich9-usb-uhci3,id=usb1.2,multifunction=on,masterbus=usb1.0,addr=0x1d.0x4,firstport=4,bus=pci.0 \
    -device usb-tablet,id=usb-tablet1,bus=usb1.0,port=1 \
    -device virtio-scsi-pci,id=virtio_scsi_pci0,bus=pci.0,addr=0x3 \
    -blockdev node-name=file_image1,driver=file,auto-read-only=on,discard=unmap,aio=threads,filename=/home/kvm_autotest_root/images/win2019-64-virtio-scsi.qcow2,cache.direct=on,cache.no-flush=off \
    -blockdev node-name=drive_image1,driver=qcow2,read-only=off,cache.direct=on,cache.no-flush=off,file=file_image1 \
    -device scsi-hd,id=image1,drive=drive_image1,write-cache=on \
    -blockdev node-name=host_device_stg0,driver=host_device,auto-read-only=on,discard=unmap,aio=threads,filename=/dev/sde,cache.direct=on,cache.no-flush=off \
    -blockdev node-name=drive_stg0,driver=raw,read-only=off,cache.direct=on,cache.no-flush=off,file=host_device_stg0 \
    -device scsi-block,id=stg0,drive=drive_stg0 \
    -device virtio-net-pci,mac=9a:a7:e2:63:66:14,id=idRtFaeP,netdev=idABy47V,bus=pci.0,addr=0x4  \
    -netdev tap,id=idABy47V,vhost=on \
    -blockdev node-name=file_cd1,driver=file,auto-read-only=on,discard=unmap,aio=threads,filename=/home/kvm_autotest_root/iso/windows/winutils.iso,cache.direct=on,cache.no-flush=off \
    -blockdev node-name=drive_cd1,driver=raw,read-only=on,cache.direct=on,cache.no-flush=off,file=file_cd1 \
    -device scsi-cd,id=cd1,drive=drive_cd1  \
    -rtc base=localtime,clock=host,driftfix=slew  \
    -boot menu=off,order=cdn,once=c,strict=off \
    -vnc :5 \
     -rtc base=localtime,clock=host,driftfix=slew  \
     -boot menu=off,order=cdn,once=c,strict=off \
     -enable-kvm \
     -monitor stdio \
    -qmp tcp:0:5955,server=on,wait=off \




3.wait for the guest boot,the check the disk
wmic diskdrive get index
or disk managerment.

Actual results:
Not found the disk


Expected results:
The disk should exist and usable.


Additional info:
  
No issue on
Red Hat Enterprise Linux release 8.4 (Ootpa)
4.18.0-305.el8.x86_64
qemu-kvm-5.2.0-16.module+el8.4.0+13043+9eb47245.11.x86_64
seabios-bin-1.13.0-2.module+el8.3.0+7353+9de0a3cc.noarch
edk2-ovmf-20200602gitca407c7246bf-4.el8.noarch
virtio-win-prewhql-0.1-214.iso

and

Red Hat Enterprise Linux release 8.2 (Ootpa)
4.18.0-305.el8.x86_64
qemu-kvm-4.2.0-18.module+el8.2.0+6278+dfae3426.x86_64
seabios-bin-1.13.0-1.module+el8.2.0+5520+4e5817f3.noarch
seabios-1.13.0-1.module+el8.2.0+5520+4e5817f3.x86_64
edk2-ovmf-20190829git37eef91017ad-9.el8.noarch
virtio-win-prewhql-0.1-214.iso


There is no issue on RHEL guest.
And RHEL guest boot fast.The fault disk looks like does not affect the boot.