Bugfix patches for i386/vmi/paravirt-ops

Andi, Linus, we have some critical bugfixes for the VMI paravirt-ops code. Please apply. If there are objections to certain pieces, they can be reworked, but they are pretty much all needed for correctness. We are hoping to get these in the next 2.6.21-rc release.

We had quite a few difficulties debugging after the integration of the hrtimers code, which is why this took so long. Andrew, add you on the list in case any further hrtimers integration issues pop up.

Thanks,

Zach