* Paolo Bonzini (pbonz...@redhat.com) wrote: > On 06/04/21 13:42, Vitaly Kuznetsov wrote: > > older machine types are still available (I disable it for <= 5.1 but we > > can consider disabling it for 5.2 too). The feature is upstream since > > Linux 5.8, I know that QEMU supports much older kernels but this doesn't > > probably mean that we can't enable new KVM PV features unless all > > supported kernels have it, we'd have to wait many years otherwise. > > Yes, this is a known problem in fact. :( In 6.0 we even support RHEL 7, > though that will go away in 6.1. > > We should take the occasion of dropping RHEL7 to be clearer about which > kernels are supported.
It would be nice to be able to define sets of KVM functonality that we can either start given machine types with, or provide a separate switch to limit kvm functionality back to some defined point. We do trip over the same things pretty regularly when accidentally turning on new features. Dave > Paolo > -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
