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

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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

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