Re: [PATCH 0/2] i386: Fix interrupt based Async PF enablement

[Paolo Bonzini]

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