> Ubuntu works just fine in such virtualisation environments, provided the
> host and guest are using the correct kernel versions.

Well, that means that Lucid will be a whole lot less relevant on the
server side than previous Ubuntu versions.

I'm sure you know that Xen is still not fully incorporated in the
kernel.org mainline tree.

That means there are many, many machines out there that run older kernel
versions in the dom0, since the Xen patches don't necessarily have the
same levels of reliability against the most recent kernels. The
situation is a bit better now with the release of Xen 4.0, but the
installed base of older dom0s is still out there.

I have dozens of such servers. They run Hardy or Lenny in the dom0. None
of them will be able to run Lucid as a domU, except presumably if I run
them fully virtualized which is a performance hit (see
http://wiki.xensource.com/xenwiki/XenOverview).

What kernel version is required, actually? Is it really *that*
impossible to fix this mountall call?

-- 
After upgrade from Karmic boot fails, mountall and udevd fail
https://bugs.launchpad.net/bugs/516684
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