I'm still very unhappy about the get/set flag state. What is the reason you can't use/extend leases? (take a look at the fcntl man page and look for Leases). A variant of the concept is what the pNFS block server uses. -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html