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

[Michael R. Hines]

On 07/29/2013 06:18 AM, Daniel P. Berrange wrote:
> On Fri, Jul 26, 2013 at 12:16:08PM -0600, Eric Blake wrote:
>> 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.
> If it is an experimental API & naming, we definitely do not want to
> expose that in the libvirt public API. We need to expose a stable
> API for libvirt's client apps. If we can't do that until QEMU itself
> is stable, then we'll have to wait.
>
> Daniel

Acknowledged. Will work it out with the QEMU community (they are in 
freeze too, so will wait till next month).

- Michael