NFSv4.0 callbacks over krb5 have been broken for a while. With the following three patches I've at least witnessed a succesful null callback. --b. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html