[Xen-devel] [RFC 17/23] xen/grant-table: Make it running on 64KB granularity

David Vrabel david.vrabel at citrix.com
Tue May 19 08:27:41 PDT 2015

On 14/05/15 18:00, Julien Grall wrote:
> The Xen interface is using 4KB page granularity. This means that each
> grant is 4KB.
> The current implementation allocates a Linux page per grant. On Linux
> using 64KB page granularity, only the first 4KB of the page will be
> used.
> We could decrease the memory wasted by sharing the page with multiple
> grant. It will require some care with the {Set,Clear}ForeignPage macro.
> Note that no changes has been made in the x86 code because both Linux
> and Xen will only use 4KB page granularity.

Reviewed-by: David Vrabel <david.vrabel at citrix.com>


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