Comment 0 for bug 1847361

Upgrading qemu binaries causes the on-disk versions to change, but the in-memory running instances still attempt to dynamically load a library which matches its same version. This can cause running instances to fail actions like hotplugging devices. This can be alleviated by migrating the instance to a new host or restarting the instance, however in cloud type environments there may be instances that cannot be migrated (sriov, etc) or the cloud operator does not have permission to reboot.

This may be resolvable for many situations by changing the packaging to keep older versions of qemu libraries around on disk (similar to how the kernel package keeps older kernel versions around).