Open Stack

Hi everyone,

Currently nova exposes all the host CPU instruction set extensions available
on the compute node in the host state, and there is a scheduler filter
`ComputeCapabilitiesFilter` which looks at these.

But the limits on this is:
CPU instruction set in ComputeCapabilitiesFilter should be guest's view instead of host's.

Admin may use specific set of CPU instruction to deploy instance to make
it migratable in a heterogeneous cloud.
This is actually by design in nova as nova is using baselineCPU
andallowed to pass/config guest CPU instruction feature for instance.

Shall we add a string "guest_features" in ``ComputeNode`` object as ``ComputeNode:cpu_info:guest_features``
And let ComputeCapabilitiesFilter use guest_features instead of host features here?

Is this a real gap ? and the above easy fix is the right way ?

Thanks
-yuntongjin


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