On 02/24/2016 07:31 AM, Michael S. Tsirkin wrote: >> One of the benefits is forward compatibility, so that counters that have >> graduated into supported ones and have got their own number and name, >> can be made to work with qemu that doesn't yet recognize them. > > Then management does start relying on the x- prefixed things, > and once it's used to that it's a slippery slope.
Any management tool that relies on an x- prefix name is broken. We've explicitly documented that the x- prefix is unstable and liable to go away with a future release. Any management app that wants to use a feature beginning with x- should FIRST push hard to get the x- removed and stabilize the interface (and libvirt, at least, does just that). -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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