Re: [libvirt] [PATCH V2] Expose all CPU features in host definition

On Mon, Jun 17, 2013 at 10:27:36AM +0200, Jiri Denemark wrote: > On Fri, Jun 14, 2013 at 12:32:35 -0600, Don Dugger wrote: > > On Fri, Jun 14, 2013 at 03:06:52PM +0200, Jiri Denemark wrote: > > > I was just trying to say that it doesn't provide anything more than > > > "it's supported by the host CPU", which gives mostly no value in the > > > context of libvirt. Can you explain more what the use case is in which a > > > virt client would need to know what specific feature are supported by > > > host CPU? I feel like we should avoid people from being under the > > > impression that they can actually use the CPU capabilities for checking > > > whether a host can run guests that require specific CPU features. > > > > The specific use case I'm trying to address is a cloud environment where, > > with hundreds of hosts, you might want to schedule an instance to a host > > that supports a particular HW acceleration, like AES/NI. I agree, what > > I `really` want is an API that shows the capabilities of a specific guest > > that could be created on the host but, absent that API, at least knowing > > that a host doesn't support the feature is more information than I can get > > right now. > > Hmm, fair enough. Let's wait a few days for Daniel to return from > vacation in case he wants to express his opinion here. So, any progress here?