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[Qemu-devel] [Bug 1594239] Re: After adding more scsi disks for Aarch64

From: Cole Robinson
Subject: [Qemu-devel] [Bug 1594239] Re: After adding more scsi disks for Aarch64 virtual machine, start the VM and got Qemu Error
Date: Tue, 28 Jun 2016 16:46:10 -0000

This seems to be a minimal reproducer:

qemu-system-aarch64 \
  -machine virt-2.6,accel=tcg \
  -nodefaults \
  -no-user-config \
  -nographic -monitor stdio \
  -device virtio-scsi-device,id=scsi0 \
  -device virtio-scsi-device,id=scsi1 \
  -drive file=foo.img,format=raw,if=none,id=d0 \
  -device scsi-hd,bus=scsi0.0,drive=d0 \
  -drive file=foo.img,format=raw,if=none,id=d1 \
  -device scsi-hd,bus=scsi1.0,drive=d1

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  After adding more scsi disks for Aarch64 virtual machine, start the VM
  and got Qemu Error

Status in QEMU:

Bug description:
  Using virt-manager to create a VM in Aarch64, Ubuntu 16.04.
  Add scsi disk to the VM. After add four or more scsi disks, start the VM and 
will got Qemu error.

  Steps to reproduce
  1.Use virt-manager to create a VM.
  2.After the VM is started, add scsi disk to the VM. They will be allocated to 
"sdb,sdc,sdd....." .
  3.If we got a disk name > sdg, virt-manager will also assign a virtio-scsi 
controller for this disk.And the VM will be shutdown.
  4.Start the VM, will see the error log.

  Expected result
  Start the vm smoothly.The added disks can work.

  Actual result
  Got the error:
  starting domain: internal error: process exited while connecting to monitor: 
qemu-system-aarch64: /build/qemu-zxCwKP/qemu-2.5+dfsg/migration/savevm.c:620: 
vmstate_register_with_alias_id: Assertion `!se->compat || se->instance_id == 0' 
  details=Traceback (most recent call last):
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 90, in 
      callback(asyncjob, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 126, in tmpcb
      callback(*args, **kwargs)
    File "/usr/share/virt-manager/virtManager/libvirtobject.py", line 83, in 
      ret = fn(self, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/domain.py", line 1402, in startup
    File "/usr/local/lib/python2.7/dist-packages/libvirt.py", line 1035, in 
      if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
  libvirtError: internal error: process exited while connecting to monitor: 
qemu-system-aarch64: /build/qemu-zxCwKP/qemu-2.5+dfsg/migration/savevm.c:620: 
vmstate_register_with_alias_id: Assertion `!se->compat || se->instance_id == 0' 

  1. virt-manager version is 1.3.2

  2. Which hypervisor did you use?
      $ kvm --version
      QEMU emulator version 2.5.0 (Debian 1:2.5+dfsg-5ubuntu10.1), Copyright 
(c) 2003-2008 Fabrice Bellard
      $ libvirtd --version
      libvirtd (libvirt) 1.3.1

  3. Which storage type did you use?
     In the host file system,all in one physics machine.
  address@hidden:/opt/stack/nova$ df -hl
  Filesystem Size Used Avail Use% Mounted on
  udev 7.8G 0 7.8G 0% /dev
  tmpfs 1.6G 61M 1.6G 4% /run
  /dev/sda2 917G 41G 830G 5% /
  tmpfs 7.9G 0 7.9G 0% /dev/shm
  tmpfs 5.0M 0 5.0M 0% /run/lock
  tmpfs 7.9G 0 7.9G 0% /sys/fs/cgroup
  /dev/sda1 511M 888K 511M 1% /boot/efi
  cgmfs 100K 0 100K 0% /run/cgmanager/fs
  tmpfs 1.6G 0 1.6G 0% /run/user/1002
  tmpfs 1.6G 0 1.6G 0% /run/user/1000
  tmpfs 1.6G 0 1.6G 0% /run/user/0

  4. Environment information:
     Architecture : AARCH64
     OS: Ubuntu 16.04

  The Qemu commmand of libvirt is :
  2016-06-20 02:39:46.561+0000: starting up libvirt version: 1.3.1, package: 
1ubuntu10 (William Grant <address@hidden> Fri, 15 Apr 2016 12:08:21 +1000), 
qemu version: 2.5.0 (Debian 1:2.5+dfsg-5ubuntu10.1), hostname: u202154
  LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin 
QEMU_AUDIO_DRV=none /usr/bin/kvm -name cent7 -S -machine virt,accel=kvm,usb=off 
-cpu host -drive 
file=/var/lib/libvirt/qemu/nvram/cent7_VARS.fd,if=pflash,format=raw,unit=1 -m 
2048 -realtime mlock=off -smp 2,sockets=2,cores=1,threads=1 -uuid 
d5462bb6-159e-4dbd-9266-bf8c07fa1695 -nographic -no-user-config -nodefaults 
 -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown 
-boot strict=on -device i82801b11-bridge,id=pci.1,bus=pcie.0,addr=0x1 -device 
pci-bridge,chassis_nr=2,id=pci.2,bus=pci.1,addr=0x1 -device 
virtio-scsi-device,id=scsi0 -device lsi,id=scsi1 -device lsi,id=scsi2 -device 
virtio-scsi-device,id=scsi3 -usb -drive 
 -drive if=none,id=drive-scsi0-0-0-1,readonly=on -device 
 -netdev tap,fd=33,id=hostnet0,vhost=on,vhostfd=35 -device 
virtio-net-device,netdev=hostnet0,id=net0,mac=52:54:00:a1:6e:75 -serial pty 
-msg timestamp=on
  Domain id=11 is tainted: host-cpu

  The libvirt xml is:
  <domain type='kvm'>
    <memory unit='KiB'>2097152</memory>
    <currentMemory unit='KiB'>2097152</currentMemory>
    <vcpu placement='static'>2</vcpu>
      <type arch='aarch64' machine='virt'>hvm</type>
      <loader readonly='yes' 
      <boot dev='hd'/>
    <cpu mode='host-passthrough'/>
    <clock offset='utc'/>
      <disk type='file' device='disk'>
        <driver name='qemu' type='qcow2'/>
        <source file='/var/lib/libvirt/images/cent7-2.img'/>
        <target dev='sda' bus='scsi'/>
        <address type='drive' controller='0' bus='0' target='0' unit='0'/>
      <disk type='file' device='cdrom'>
        <driver name='qemu' type='raw'/>
        <target dev='sdb' bus='scsi'/>
        <address type='drive' controller='0' bus='0' target='0' unit='1'/>
      <disk type='file' device='disk'>
        <driver name='qemu' type='qcow2'/>
        <source file='/var/lib/libvirt/images/cent7-10.img'/>
        <target dev='sdc' bus='scsi'/>
        <address type='drive' controller='0' bus='0' target='0' unit='2'/>
      <disk type='file' device='disk'>
        <driver name='qemu' type='qcow2'/>
        <source file='/var/lib/libvirt/images/cent7-11.img'/>
        <target dev='sdd' bus='scsi'/>
        <address type='drive' controller='0' bus='0' target='0' unit='3'/>
      <disk type='file' device='disk'>
        <driver name='qemu' type='qcow2'/>
        <source file='/var/lib/libvirt/images/cent7-13.img'/>
        <target dev='sdv' bus='scsi'/>
        <address type='drive' controller='3' bus='0' target='0' unit='0'/>
      <controller type='scsi' index='0' model='virtio-scsi'>
        <address type='virtio-mmio'/>
      <controller type='scsi' index='1'>
        <address type='virtio-mmio'/>
      <controller type='scsi' index='2'>
        <address type='virtio-mmio'/>
      <controller type='scsi' index='3' model='virtio-scsi'>
        <address type='virtio-mmio'/>
      <controller type='pci' index='0' model='pcie-root'/>
      <controller type='pci' index='1' model='dmi-to-pci-bridge'>
        <model name='i82801b11-bridge'/>
        <address type='pci' domain='0x0000' bus='0x00' slot='0x01' 
      <controller type='pci' index='2' model='pci-bridge'>
        <model name='pci-bridge'/>
        <target chassisNr='2'/>
        <address type='pci' domain='0x0000' bus='0x01' slot='0x01' 
      <interface type='bridge'>
        <mac address='52:54:00:a1:6e:75'/>
        <source bridge='br0'/>
        <model type='virtio'/>
        <address type='virtio-mmio'/>
      <serial type='pty'>
        <target port='0'/>
      <console type='pty'>
        <target type='serial' port='0'/>

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