Getting Xen "into" the Linux kernel has been a long-running saga. But good things come to all those who wait — and work hard to coordinate with kernel maintainers. That's the long way of saying that Linux 3.0 now has Xen dom0 support. Konrad Rzeszutek Wilk notes that there's still work to be done in a few areas but "the majority of needs will be satisfied by the 3.0 kernel."
What does dom0 support mean? Basically it means that Linux will be usable as a host kernel for Xen. Now, that's been the case for years and years — but it required patching the kernel, rather than having stock support in the kernel. With 3.0 and dom0 support fully integrated, that means that the days of having to run a patched kernel or vendors having to add (and maintain) patches for Xen are drawing to a close.
The Xen wiki has a longer and more detailed discussion of dom0 for folks who really want to dig in.
Joe 'Zonker' Brockmeier
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