I found some posts from quite a while ago on xen-devel discussing
patches to allow large pages, so my question is for clarification on
the status of this feature. I.e., is it in any stable release and if
so what version?
Its a work in progress, but there's nothing usable yet, as far as I
know.
Oracle have been working on PV 2MB page support, and I expect they'll pitch in with an update.
Over the last 18 months or so there have been a number of changes to xen's PV PT handling that make support of 2MB pages significantly easier than it was previously. However, the guest has to be careful how it uses them as it can't alias any memory that may be used for storing pagetables pages (that must be RO).
Thanks for the update. I'll wait to hear from the Oracle guys.