On Wed, Jan 23, 2008 at 01:51:23PM +0100, Gerd Hoffmann wrote:
Jumping in here, looks like this could develop into a direction useful
for Xen.
Background: Xen has a mechanism called "grant tables" for page sharing.
Guest #1 can issue a "grant" for another guest #2, which in turn then
can use that grant to map the page owned by guest #1 into its address
space. This is used by the virtual network/disk drivers, i.e. typically
Domain-0 (which has access to the real hardware) maps pages of other
guests to fill in disk/network data.
This is extremely similar to what XPMEM is providing.