RE: [Xen-devel] 2MB page PV guest support clarification

[Ian Pratt <Ian.Pratt@xxxxxxxxxxxxx>]

> > 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).

Ian

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