> The PowerPC 440 Linux kernel uses 256MB pages for the linear mapping.
> When we run that as a guest, those pages would of course need to be
> physically contiguous in the host.

> Another possibility is to fake out guest large pages by actually using
> small pages on the host, and handle the extra faults in KVM without
> notifying the guest.

That seems like the best plan, for a first shot anyway.  Also,
even when you do support backing 256MB pages with 256MB pages,
you probably still want the small-page backing as a backup in
case you run out of large pages.


Segher


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