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Re: [Qemu-devel] [Bug 1594239] Re: After adding more scsi disks for Aarc
From: |
Tom Hanson |
Subject: |
Re: [Qemu-devel] [Bug 1594239] Re: After adding more scsi disks for Aarch64 virtual machine, start the VM and got Qemu Error |
Date: |
Tue, 05 Jul 2016 15:46:11 -0000 |
What would a device path look like for an MMIO backend?
On Jul 5, 2016 9:35 AM, "Laszlo Ersek (Red Hat)" <address@hidden> wrote:
> I don't think this difference is intentional. I think we're seeing an
> interplay between the following two commits:
>
> * http://git.qemu.org/?p=qemu.git;a=commitdiff;h=4d2ffa08b601b
> * http://git.qemu.org/?p=qemu.git;a=commitdiff;h=7685ee6abcb93
>
> Referring to the message of the second commit above, the problem is that
> sysbus doesn't implement get_dev_path, hence it doesn't support
> "creating unique savevm id strings".
>
> virtio_bus_get_dev_path() simply defers to the parent bus ("main-system-
> bus" in this case).
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1594239
>
> Title:
> After adding more scsi disks for Aarch64 virtual machine, start the VM
> and got Qemu Error
>
> Status in QEMU:
> Confirmed
>
> Bug description:
> 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' failed.
> details=Traceback (most recent call last):
> File "/usr/share/virt-manager/virtManager/asyncjob.py", line 90, in
> cb_wrapper
> 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 newfn
> ret = fn(self, *args, **kwargs)
> File "/usr/share/virt-manager/virtManager/domain.py", line 1402, in
> startup
> self._backend.create()
> File "/usr/local/lib/python2.7/dist-packages/libvirt.py", line 1035,
> in create
> 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' failed.
>
>
> Environment
> ===========
> 1. virt-manager version is 1.3.2
>
> 2. Which hypervisor did you use?
> Libvirt+KVM
> $ 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=/usr/share/edk2.git/aarch64/QEMU_EFI-pflash.raw,if=pflash,format=raw,unit=0,readonly=on
> -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
> -chardev
> socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-cent7/monitor.sock,server,nowait
> -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
> file=/var/lib/libvirt/images/cent7-2.img,format=qcow2,if=none,id=drive-scsi0-0-0-0
> -device
> scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=1
> -drive if=none,id=drive-scsi0-0-0-1,readonly=on -device
> scsi-cd,bus=scsi0.0,channel=0,scsi-id=0,lun=1,drive=drive-scsi0-0-0-1,id=scsi0-0-0-1
> -drive
> file=/var/lib/libvirt/images/cent7-10.img,format=qcow2,if=none,id=drive-scsi0-0-0-2
> -device
> scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=2,drive=drive-scsi0-0-0-2,id=scsi0-0-0-2
> -drive
> file=/var/lib/libvirt/images/cent7-11.img,format=qcow2,if=none,id=drive-scsi0-0-0-3
> -device
> scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=3,drive=drive-scsi0-0-0-3,id=scsi0-0-0-3
> -drive
> file=/var/lib/libvirt/images/cent7-13.img,format=qcow2,if=none,id=drive-scsi3-0-0-0
> -device
> scsi-hd,bus=scsi3.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi3-0-0-0,id=scsi3-0-0-0
> -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'>
> <name>cent7</name>
> <uuid>d5462bb6-159e-4dbd-9266-bf8c07fa1695</uuid>
> <memory unit='KiB'>2097152</memory>
> <currentMemory unit='KiB'>2097152</currentMemory>
> <vcpu placement='static'>2</vcpu>
> <os>
> <type arch='aarch64' machine='virt'>hvm</type>
> <loader readonly='yes'
> type='pflash'>/usr/share/edk2.git/aarch64/QEMU_EFI-pflash.raw</loader>
> <nvram>/var/lib/libvirt/qemu/nvram/cent7_VARS.fd</nvram>
> <boot dev='hd'/>
> </os>
> <cpu mode='host-passthrough'/>
> <clock offset='utc'/>
> <on_poweroff>destroy</on_poweroff>
> <on_reboot>restart</on_reboot>
> <on_crash>restart</on_crash>
> <devices>
> <emulator>/usr/bin/kvm</emulator>
> <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>
> <disk type='file' device='cdrom'>
> <driver name='qemu' type='raw'/>
> <target dev='sdb' bus='scsi'/>
> <readonly/>
> <address type='drive' controller='0' bus='0' target='0' unit='1'/>
> </disk>
> <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>
> <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>
> <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'/>
> </disk>
> <controller type='scsi' index='0' model='virtio-scsi'>
> <address type='virtio-mmio'/>
> </controller>
> <controller type='scsi' index='1'>
> <address type='virtio-mmio'/>
> </controller>
> <controller type='scsi' index='2'>
> <address type='virtio-mmio'/>
> </controller>
> <controller type='scsi' index='3' model='virtio-scsi'>
> <address type='virtio-mmio'/>
> </controller>
> <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'
> function='0x0'/>
> </controller>
> <controller type='pci' index='2' model='pci-bridge'>
> <model name='pci-bridge'/>
> <target chassisNr='2'/>
> <address type='pci' domain='0x0000' bus='0x01' slot='0x01'
> function='0x0'/>
> </controller>
> <interface type='bridge'>
> <mac address='52:54:00:a1:6e:75'/>
> <source bridge='br0'/>
> <model type='virtio'/>
> <address type='virtio-mmio'/>
> </interface>
> <serial type='pty'>
> <target port='0'/>
> </serial>
> <console type='pty'>
> <target type='serial' port='0'/>
> </console>
> </devices>
> </domain>
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/qemu/+bug/1594239/+subscriptions
>
--
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https://bugs.launchpad.net/bugs/1594239
Title:
After adding more scsi disks for Aarch64 virtual machine, start the VM
and got Qemu Error
Status in QEMU:
Confirmed
Bug description:
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'
failed.
details=Traceback (most recent call last):
File "/usr/share/virt-manager/virtManager/asyncjob.py", line 90, in
cb_wrapper
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
newfn
ret = fn(self, *args, **kwargs)
File "/usr/share/virt-manager/virtManager/domain.py", line 1402, in startup
self._backend.create()
File "/usr/local/lib/python2.7/dist-packages/libvirt.py", line 1035, in
create
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'
failed.
Environment
===========
1. virt-manager version is 1.3.2
2. Which hypervisor did you use?
Libvirt+KVM
$ 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=/usr/share/edk2.git/aarch64/QEMU_EFI-pflash.raw,if=pflash,format=raw,unit=0,readonly=on
-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
-chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-cent7/monitor.sock,server,nowait
-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
file=/var/lib/libvirt/images/cent7-2.img,format=qcow2,if=none,id=drive-scsi0-0-0-0
-device
scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=1
-drive if=none,id=drive-scsi0-0-0-1,readonly=on -device
scsi-cd,bus=scsi0.0,channel=0,scsi-id=0,lun=1,drive=drive-scsi0-0-0-1,id=scsi0-0-0-1
-drive
file=/var/lib/libvirt/images/cent7-10.img,format=qcow2,if=none,id=drive-scsi0-0-0-2
-device
scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=2,drive=drive-scsi0-0-0-2,id=scsi0-0-0-2
-drive
file=/var/lib/libvirt/images/cent7-11.img,format=qcow2,if=none,id=drive-scsi0-0-0-3
-device
scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=3,drive=drive-scsi0-0-0-3,id=scsi0-0-0-3
-drive
file=/var/lib/libvirt/images/cent7-13.img,format=qcow2,if=none,id=drive-scsi3-0-0-0
-device
scsi-hd,bus=scsi3.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi3-0-0-0,id=scsi3-0-0-0
-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'>
<name>cent7</name>
<uuid>d5462bb6-159e-4dbd-9266-bf8c07fa1695</uuid>
<memory unit='KiB'>2097152</memory>
<currentMemory unit='KiB'>2097152</currentMemory>
<vcpu placement='static'>2</vcpu>
<os>
<type arch='aarch64' machine='virt'>hvm</type>
<loader readonly='yes'
type='pflash'>/usr/share/edk2.git/aarch64/QEMU_EFI-pflash.raw</loader>
<nvram>/var/lib/libvirt/qemu/nvram/cent7_VARS.fd</nvram>
<boot dev='hd'/>
</os>
<cpu mode='host-passthrough'/>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<emulator>/usr/bin/kvm</emulator>
<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>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<target dev='sdb' bus='scsi'/>
<readonly/>
<address type='drive' controller='0' bus='0' target='0' unit='1'/>
</disk>
<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>
<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>
<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'/>
</disk>
<controller type='scsi' index='0' model='virtio-scsi'>
<address type='virtio-mmio'/>
</controller>
<controller type='scsi' index='1'>
<address type='virtio-mmio'/>
</controller>
<controller type='scsi' index='2'>
<address type='virtio-mmio'/>
</controller>
<controller type='scsi' index='3' model='virtio-scsi'>
<address type='virtio-mmio'/>
</controller>
<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'
function='0x0'/>
</controller>
<controller type='pci' index='2' model='pci-bridge'>
<model name='pci-bridge'/>
<target chassisNr='2'/>
<address type='pci' domain='0x0000' bus='0x01' slot='0x01'
function='0x0'/>
</controller>
<interface type='bridge'>
<mac address='52:54:00:a1:6e:75'/>
<source bridge='br0'/>
<model type='virtio'/>
<address type='virtio-mmio'/>
</interface>
<serial type='pty'>
<target port='0'/>
</serial>
<console type='pty'>
<target type='serial' port='0'/>
</console>
</devices>
</domain>
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1594239/+subscriptions
- [Qemu-devel] [Bug 1594239] Re: After adding more scsi disks for Aarch64 virtual machine, start the VM and got Qemu Error, (continued)
- [Qemu-devel] [Bug 1594239] Re: After adding more scsi disks for Aarch64 virtual machine, start the VM and got Qemu Error, Laszlo Ersek \(Red Hat\), 2016/07/02
- [Qemu-devel] [Bug 1594239] Re: After adding more scsi disks for Aarch64 virtual machine, start the VM and got Qemu Error, Tom Hanson, 2016/07/05
- [Qemu-devel] [Bug 1594239] Re: After adding more scsi disks for Aarch64 virtual machine, start the VM and got Qemu Error, Dr. David Alan Gilbert, 2016/07/05
- [Qemu-devel] [Bug 1594239] Re: After adding more scsi disks for Aarch64 virtual machine, start the VM and got Qemu Error, Tom Hanson, 2016/07/05
- [Qemu-devel] [Bug 1594239] Re: After adding more scsi disks for Aarch64 virtual machine, start the VM and got Qemu Error, Laszlo Ersek \(Red Hat\), 2016/07/05
- Re: [Qemu-devel] [Bug 1594239] Re: After adding more scsi disks for Aarch64 virtual machine, start the VM and got Qemu Error,
Tom Hanson <=
- [Qemu-devel] [Bug 1594239] Re: After adding more scsi disks for Aarch64 virtual machine, start the VM and got Qemu Error, Laszlo Ersek \(Red Hat\), 2016/07/05
- [Qemu-devel] [Bug 1594239] Re: After adding more scsi disks for Aarch64 virtual machine, start the VM and got Qemu Error, Tom Hanson, 2016/07/05
- [Qemu-devel] [Bug 1594239] Re: After adding more scsi disks for Aarch64 virtual machine, start the VM and got Qemu Error, Laszlo Ersek \(Red Hat\), 2016/07/05
- [Qemu-devel] [Bug 1594239] Re: After adding more scsi disks for Aarch64 virtual machine, start the VM and got Qemu Error, Tom Hanson, 2016/07/05
- [Qemu-devel] [Bug 1594239] Re: After adding more scsi disks for Aarch64 virtual machine, start the VM and got Qemu Error, Laszlo Ersek \(Red Hat\), 2016/07/05
- [Qemu-devel] [Bug 1594239] Re: After adding more scsi disks for Aarch64 virtual machine, start the VM and got Qemu Error, Laszlo Ersek \(Red Hat\), 2016/07/14