Re: [Qemu-devel] [Bug 1518969] [NEW] Instance of QEMU doesn't unplug virtio scsi disk after device_del and drive_del commands

[Markus Armbruster]

Marian Horban <address@hidden> writes:

> Public bug reported:
>
> device_del and drive_del commands don't cause virtio disk detaching
>
> Steps to reproduce:
> 1. Run instance
>
> 2. Attach virtio scsi disk
>
> 3. Reboot instance
>
> 4. Immediately after reboot detach disk with QEMU commands:
> device_del
> drive_del

Exact commands, please, for steps 2..4 (step 1 is covered below).

> Expected result:
> Disk should be detached anyway
>
> Actual:
> Domain info contains attached disk even after waiting long period of time(5 
> min in my case).

What do you mean by "domain info"?

> Additional info:
> QEMU process:
> root     29010 42.6  1.9 562036 61272 ?        Rl   03:42   0:01 
> /usr/bin/qemu-system-x86_64 -name instance-00000069 -S -machine 
> pc-i440fx-trusty,accel=tcg,usb=off -m 64 -realtime mlock=off -smp 
> 1,sockets=1,cores=1,threads=1 -uuid d2418536-2547-4740-96b5-0d4f1d74b9f3 
> -smbios type=1,manufacturer=OpenStack Foundation,product=OpenStack 
> Nova,version=13.0.0,serial=1fd8f69a-909b-4ed1-aae9-4fc9318fc622,uuid=d2418536-2547-4740-96b5-0d4f1d74b9f3,family=Virtual
>  Machine -no-user-config -nodefaults -chardev 
> socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance-00000069.monitor,server,nowait
>  -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown 
> -boot strict=on -kernel 
> /opt/stack/data/nova/instances/d2418536-2547-4740-96b5-0d4f1d74b9f3/kernel 
> -initrd 
> /opt/stack/data/nova/instances/d2418536-2547-4740-96b5-0d4f1d74b9f3/ramdisk 
> -append root=/dev/vda console=tty0 console=ttyS0 no_timer_check -device 
> piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive 
> file=/opt/stack/data/nova/instances/d2418536-2547-4740-96b5-0d4f1d74b9f3/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none
>  -device 
> virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
>  -drive 
> file=/opt/stack/data/nova/instances/d2418536-2547-4740-96b5-0d4f1d74b9f3/disk.config,if=none,id=drive-ide0-1-1,readonly=on,format=raw,cache=none
>  -device ide-cd,bus=ide.1,unit=1,drive=drive-ide0-1-1,id=ide0-1-1 -netdev 
> tap,fd=18,id=hostnet0 -device 
> virtio-net-pci,netdev=hostnet0,id=net0,mac=fa:16:3e:1a:10:3d,bus=pci.0,addr=0x3
>  -chardev 
> file,id=charserial0,path=/opt/stack/data/nova/instances/d2418536-2547-4740-96b5-0d4f1d74b9f3/console.log
>  -device isa-serial,chardev=charserial0,id=serial0 -chardev 
> pty,id=charserial1 -device isa-serial,chardev=charserial1,id=serial1 -vnc 
> 127.0.0.1:1 -k en-us -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -device 
> virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5
>
> QEMU version:
> qemu-system-x86_64 --version
> QEMU emulator version 2.0.0 (Debian 2.0.0+dfsg-2ubuntu1.19), Copyright (c) 
> 2003-2008 Fabrice Bellard
>
> ** Affects: qemu
>      Importance: Undecided
>          Status: New