Hello everybody, I have finally found the time to augment my patch set with the previous work done by Norbert Trapp and clean it up. I didn't include Norbert's performance improvements, because I believe they constitute an independent change (and we may even want to add generic infrastructure to be used by all architectures). I have tested this patch set with: - Xen-3.2.3 - WORKS - Xen-4.0.1 - WORKS (only with --xen-syms) - Xen-4.0.2 - WORKS - Xen-4.1.2 - WORKS Filtering free pages doesn't work (even after I manually provide the missing "max_pfn" symbol), but that seems unrelated, so I'm going to address it in a subsequent patch set. Petr Tesarik SUSE Linux