Re: [Xen-devel][RFC] Dynamic modes support for PV xenfb (included)

[Markus Armbruster <armbru@xxxxxxxxxx>]

The current PVFB code shares the framebuffer as follows.  The
framebuffer is described by a two level directory.  The first level is
the page directory pd[] in the shared page.  pd[] contains the mfns of
the second level directory pages.  Those form an array containing the
mfns of the framebuffer.

Your patch replaces both levels of the page directory by grants, but
not the framebuffer itself.  What exactly does that buy us?

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