Comment 13 for bug 1921665

Performing verification for Groovy.

I installed qemu 5.0-5ubuntu9.6 from -updates with the usual KVM stack command:

$ sudo apt-get install qemu-kvm libvirt-daemon-system libvirt-clients bridge-utils
$ sudo reboot

From there I installed and configured a NFS server:

$ sudo -s
$ sudo apt install nfs-kernel-server
$ mkdir -p /export
$ chown libvirt-qemu:kvm /export
$ echo "/export 127.0.0.1(rw,sync,no_subtree_check)" >> /etc/exports
$ systemctl restart nfs-server

Created a disk image:

$ truncate -s 10000000000 /export/reproducer-centos.img
$ chown libvirt-qemu:kvm /export/reproducer-centos.img
$ chmod 666 /export/reproducer-centos.img

and mounted the NFS server:

$ mount 127.0.0.1:/export /mnt -o bg,noacl,noatime,nolock,vers=3,noauto

I downloaded the CentOS image:

$ wget https://vault.centos.org/7.2.1511/isos/x86_64/CentOS-7-x86_64-Minimal-1511.iso

and started the VM with the following QEMU command line:

$ sudo qemu-system-x86_64 -cdrom ./CentOS-7-x86_64-Minimal-1511.iso -m 1024 -blockdev '{"driver":"file","filename":"/mnt/reproducer-centos.img","node-name":"disk0","cache":{"direct":true}}' -device virtio-blk-pci,drive=disk0 -vnc 0.0.0.0:0 -enable-kvm

On my host I opened Reminna, connected to a VNC connection on <ip address>:5900.

The CentOS installer eventually showed up, and I followed the steps:

Click Continue at the language/keyboard selection screen.
Click Installation Destination.
Click Done (no changes needed on that screen).
Click Begin Installation.

A few seconds later QEMU crashed with:

qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.80000001H:ECX.svm [bit 2]
qemu-system-x86_64: /build/qemu-RSjBPs/qemu-5.0/block/io.c:1887: bdrv_co_write_req_prepare: Assertion `end_sector <= bs->total_sectors || child->perm & BLK_PERM_RESIZE' failed.
Aborted

I then enabled -proposed, and installed qemu 5.0-5ubuntu9.7

$ sudo apt install qemu-kvm qemu-system-data qemu-system-gui qemu-system-x86

I then re-started the qemu VM with:

$ sudo qemu-system-x86_64 -cdrom ./CentOS-7-x86_64-Minimal-1511.iso -m 1024 -blockdev '{"driver":"file","filename":"/mnt/reproducer-centos.img","node-name":"disk0","cache":{"direct":true}}' -device virtio-blk-pci,drive=disk0 -vnc 0.0.0.0:0 -enable-kvm

This time the VM managed to format the disk, and successfully install CentOS.

The packages in -proposed fix the issue, and I am happy to mark the bug as verified.