[libvirt] [PATCH 0/3] qemu: libvirt RDMA live migration support

Eric Blake eblake at redhat.com
Fri Jul 26 18:16:08 UTC 2013


On 07/26/2013 11:47 AM, mrhines at linux.vnet.ibm.com wrote:
> From: "Michael R. Hines" <mrhines at us.ibm.com>
> 
> QEMU has in tree now planned for 1.6 support for RDMA-based live migration.
> 
> Changes to libvirt:
> 1. QEMU has a new 'setup' phase in their state machine.
> 2. Expose the 'x-rdma' migration protocol URI.
> 3. Expose the 'x-rdma-pin-all' capability for pre-registration of memory.

The x- prefix means that the migration is still experimental; do we want
to be codifying the use of experimental API into libvirt, or is it time
for a patch to qemu to remove the x- prefix?  Back in the 1.5 timeframe,
when RDMA was first proposed, the x- prefix made sense, but now that we
are closer to qemu 1.6, and you are trying to get libvirt to drive it,
that's a declaration of stability.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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