[libvirt] [RFC PATCH v2 3/3] qemu: memory pre-pinning support for RDMA migration

[Paolo Bonzini]

Il 04/04/2014 22:46, Eric Blake ha scritto:
>> >
>> > I'm still not seeing what's wrong with depending on the version
>> > number since other features are also depending on the version
>> > number.
> Every feature where we have to guess based on version number is due to a
> bug in qemu for not providing enough information for libvirt to probe
> for the feature's existence.  We hate those features, and I have been
> lobbying hard on the qemu list that all NEW features should be
> discoverable.  rdma is one such feature - I recall you making changes in
> your series there so that it is discoverable in response to my early
> review comments - so now please USE that methodology from libvirt.
>

I think that relied on the QAPI introspection.  The MigrationCapability 
rdma-pin-all will be present only if QEMU supports RDMA migration.

But QAPI introspection is not there yet. :(

Paolo