Re: [Qemu-devel] [PATCH v2 8/8] virtio-blk: add x-data-plane=on|off performance feature

[Kevin Wolf]

Am 20.11.2012 13:37, schrieb Daniel P. Berrange:
> On Tue, Nov 20, 2012 at 01:31:52PM +0100, Stefan Hajnoczi wrote:
>> The virtio-blk-data-plane feature is easy to integrate into
>> hw/virtio-blk.c.  The data plane can be started and stopped similar to
>> vhost-net.
>>
>> Users can take advantage of the virtio-blk-data-plane feature using the
>> new -device virtio-blk-pci,x-data-plane=on property.
>>
>> The x-data-plane name was chosen because at this stage the feature is
>> experimental and likely to see changes in the future.
> 
> Can you give some indication of how it is likely to change, since
> this has a bearing on any libvirt use of this feature ?

I suppose the intended semantics is "libvirt, don't touch this!"

Maybe we could document the x-... prefix for experimental features that
may be changed in incompatible ways or removed in future versions, and
that no management tools should use.

Kevin