I think I've solved simply adding a new line to /opt/etc/xinetd.d/netbios-ssn:
Now everytime smbd starts, from Top i can see NI -18.Code:service netbios-ssn { disable = no socket_type = stream protocol = tcp port = 139 user = root wait = no only_from = localhost 192.168.1.1/24 server = /opt/sbin/smbd nice = -18 }
Max