On Thu, Jul 25, 2013 at 04:09:18PM +0200, Andreas Färber wrote: > Am 25.07.2013 16:00, schrieb Eduardo Habkost: > > libvirt > > needs a way to find out how exactly "-machine foo-1.0 -cpu bar" looks > > different from "-machine foo-1.1 -cpu bar", > > Why? (What's the actual use case?) libvirt API allows individual CPU features to be configured, so libvirt needs to know what exactly will be the result of using a machine-type/CPU-model combination to make sure it will be exactly what was requested: http://libvirt.org/formatdomain.html#elementsCPU Also, libvirt needs to be able to check if migration to a host is possible (i.e. if all features enabled by a machine-type/CPU-model combination are supported by the host) before actually starting the migration process. -- Eduardo -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list