Messages in this thread | | | Subject | Re: [Xen-devel] Re: [ANNOUNCE] Xen high-performance x86 virtualization | Date | Thu, 02 Oct 2003 18:23:47 +0100 | From | Keir Fraser <> |
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> And the amount of work to port the architecture-specific porions of > Xen to x86-xeno would be.....? :-)
To allow efficient switching in and out of Xen we take a small amount of every virtual address space, and also grab ring 0. Since we don't hide that from overlying OSes, we couldn't do a full recursive implementation of Xen -- we'd run out of rings (quickly) and address space (eventually) :-)
Full recursion needs full virtualization. Our approach offers much better performance in the situations where full virtualization isn't required -- i.e., where it's feasible to distribute a ported OS.
-- Keir - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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