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Re: [libvirt] [RFC] Support for CPUID masking



On Tue, Oct 13, 2009 at 02:56:41AM -0400, john cooper wrote:
> Dor Laor wrote:
> > What about another approach for the cpuid issue:
> > I think that dealing with specific flags is pretty error prone on all
> > levels - virt-mgr, libvirt, qemu, migration, and even the guest.
> 
> ..and performance verification, QA, and the average end user.
> Unless we reduce all possible combinations of knob settings
> into a few well thought out lumped models the complexity can
> be overwhelming. 

That is a policy decision for applications to make. libvirt should expose
the fine grained named  CPU models + arbitrary flags, and other bits of
info as appropriate (eg formal model for core/socket topology). Apps can
decide whether they want to turn that into a higher level concept where
admins pick one of a handful of common setups, or expose the full level
of control

Daniel
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