jftr: Yesterday I discovered this: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=29d11cfd8698038b87458ba4d1329b9da81150a5
"xen/grant-table: log the lack of grants" This is great, this is something we have discussed before, that the domU kernel should tell something instead of just hanging. So, apparently someone implemented that already. Knorrie
