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[Xen-devel] Does Xen also plan to move the back-end driver to the stub domain for HVM?


Based on the roadmap on Xen summit, there is a plan to move QEMU and let it run on the stub domain to improve HVM performance. However, comparing with QEMU device model, it will be much easier to move BE driver and let it run in stub domain instead of dom0 as BE part is running on the kernel space (QEMU is running on user space).

but I'm little bit confused about the relationship between stub domain and guest domain. Is the stub domain part of guest domain? Does each guest domain have a stub domain which is created when the guest domain is created?

If the stub domain is part of guest domain, does porting device model to stub domain compromise the orginial design purpose of isoloated devide domain?



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