For iblock just use the new write same infrastructure, i.e. REQ_WRITE_SAME type bio. Preferably asynchronously and not using the synchronous blockdev helper. -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html