When upgrading old libvirt on a host with EPYC host CPU (or any other CPU which was added to cpu_map.xml in newer libvirt releases), we would replace host-model CPU definition for running domains to EPYC even though a different CPU model was used to start the domain. And sync old libvirt doesn't know about EPYC, migrating the domain to another host running the same old libvirt would be impossible.
https://bugzilla.redhat.com/show_bug.cgi?id=1521202 Jiri Denemark (2): qemu: Separate fetching CPU definitions from filling qemuCaps qemu: Make sure host-model uses CPU model supported by QEMU src/qemu/qemu_capabilities.c | 59 +++++++++++++++++++++++++++----------------- src/qemu/qemu_capabilities.h | 1 + src/qemu/qemu_process.c | 30 ++++++++++++++++++++++ 3 files changed, 68 insertions(+), 22 deletions(-) -- 2.15.1 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list
