Andrew- Please see my current submission of the "Trace" patches at: http://lkml.org/lkml/2007/11/12/281 http://lkml.org/lkml/2007/11/12/282 http://lkml.org/lkml/2007/11/12/283 http://lkml.org/lkml/2007/11/12/284 I believe this code is now ready for inclusion in the mm tree. Please consider this request to move trace into the mm tree. Regards David Wilder