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.
Paolo
