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SubjectRe: [PATCH] paravirt/xen: add pvop for page_is_ram
Jeremy Fitzhardinge wrote:
> From: Jeremy Fitzhardinge <>
> A guest domain may have external pages mapped into its address space,
> in order to share memory with other domains. These shared pages are
> more akin to io mappings than real RAM, and should not pass the
> page_is_ram test. Add a paravirt op for this so that a hypervisor
> backend can validate whether a page should be considered ram or not.
> Signed-off-by: Jeremy Fitzhardinge <>

Why are these pages mapped as RAM in the memory map? That is the right
way to handle that, not by adding yet another bloody hook...


H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.

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