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

[Launchpad Bug Tracker]

[Expired for QEMU because there has been no activity for 60 days.]

** Changed in: qemu
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1518969

Title:
  Instance of QEMU doesn't unplug virtio scsi disk after device_del and
  drive_del commands

Status in QEMU:
  Expired

Bug description:
  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

  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).

  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

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