On Sat, Aug 24, 2013 at 12:32:07AM +0000, Chris Leduc wrote:
> Hi - In a KVM/qemu environment is it possible for the host to back only a
> portion of the guests memory with huge pages? In some situations it may not
> be desirable to back the entirety of a guest's memory with huge pages (as can
> be done via libvirt memoryBacking option).
What are those situations?
> What would be very useful is to request huge pages in the guest, either at
> boot time or dynamically, and have the host back them with physical huge
> pages, but not back the rest of the normal page guest memory with huge pages
> from the host.
>
> The equivalent in Xen is setting allowsuperpage=1 on the hypervisor boot line.
>
As far as I can tell this disables/enables use of huge pages by XEN vm,
not something you say you want.
--
Gleb.
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