Re: [PATCH 0/6] qemu: Fix cdrom as SCSI hostdev via -blockdev

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Greetings Peter,

> Sent: Thursday, October 22, 2020 at 8:54 PM
> From: "daggs" <daggs@xxxxxxx>
> To: "Peter Krempa" <pkrempa@xxxxxxxxxx>
> Cc: libvir-list@xxxxxxxxxx
> Subject: Re: [PATCH 0/6] qemu: Fix cdrom as SCSI hostdev via -blockdev
>
> Greetings Peter,
>
> I've built the os with scsi virtio, now I do see the cdrom, see:
> # ls -lia /sys/bus/scsi/devices
> total 0
>    7017 drwxr-xr-x    2 root     root             0 Oct 22  2020 .
>    7015 drwxr-xr-x    4 root     root             0 Oct 22  2020 ..
>   18874 lrwxrwxrwx    1 root     root             0 Oct 22  2020 0:0:0:0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:06:00.0/0000:07:01.0/virtio2/host0/target0:0:0/0:0:0:0
>   17468 lrwxrwxrwx    1 root     root             0 Oct 22  2020 host0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:06:00.0/0000:07:01.0/virtio2/host0
>   18051 lrwxrwxrwx    1 root     root             0 Oct 22  2020 host1 -> ../../../devices/pci0000:00/0000:00:1f.2/ata1/host1
>   18099 lrwxrwxrwx    1 root     root             0 Oct 22  2020 host2 -> ../../../devices/pci0000:00/0000:00:1f.2/ata2/host2
>   18147 lrwxrwxrwx    1 root     root             0 Oct 22  2020 host3 -> ../../../devices/pci0000:00/0000:00:1f.2/ata3/host3
>   18195 lrwxrwxrwx    1 root     root             0 Oct 22  2020 host4 -> ../../../devices/pci0000:00/0000:00:1f.2/ata4/host4
>   18243 lrwxrwxrwx    1 root     root             0 Oct 22  2020 host5 -> ../../../devices/pci0000:00/0000:00:1f.2/ata5/host5
>   18291 lrwxrwxrwx    1 root     root             0 Oct 22  2020 host6 -> ../../../devices/pci0000:00/0000:00:1f.2/ata6/host6
>   18835 lrwxrwxrwx    1 root     root             0 Oct 22  2020 target0:0:0 -> ../../../devices/pci0000:00/0000:00:1e.0/0000:06:00.0/0000:07:01.0/virtio2/host0/target0:0:0
>
> I've tested with 6.7.0 and 6.8.0 + your patchset, in both the cdrom is visible, in 6.7.0, the guest's dmesg is filled with theses errors:
> [   57.510366] sr 0:0:0:0: ioctl_internal_command return code = 8000002
> [   57.510400] sr 0:0:0:0: Sense Key : 0xb [current]
> [   57.510403] sr 0:0:0:0: ASC=0x0 ASCQ=0x6
>
> every few seconds these lines are added to the log.
> with 6.8.0 + your patchset, I see these outputs only few times in the boot process. here is the dmesg: https://dpaste.com/F32A9B92H
> I've inserted a audio cd and expected the os ui to detected it but it didn't. I assume there is another bug there.
> anything I can do to help hunting this bug?

looks like I was mistaken, I see the same prints in 6.8.0 + your patchset. this means it is not related, so question is, is this a livbirt misconfig or qemu bug?

any insights?

Thanks,

Dagg.





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