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xen-devel
Re: [Xen-devel] [PATCH 1/5] xen/netback: Use xenballooned pages for comm
> (Will move to commit message). In PV guests, it is sufficient to only
> reserve kernel address space for grant mappings because Xen modifies the
> mappings directly. HVM guests require that Xen modify the GFN-to-MFN
> mapping, so the pages being remapped must already be allocated. Pages
By allocated you mean the populate_physmap hypercall must happen before
the grant operations are done?
(When I see allocated I think alloc_page, which I believe is _not_ what
you were saying).
> obtained from alloc_xenballooned_pages have valid GFNs not currently
> mapped to an MFN, so are available to be used in grant mappings.
>
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