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diff --git a/net/TUNABLE b/net/TUNABLE
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+The following parameters should be tunable at compile time. Some of them
+exist as sysctls too.
+
+This is far from complete
+
+Item                    Description
+----------------------------------------------------------------------------
+MAX_LINKS               Maximum number of netlink minor devices. (1-32)
+RIF_TABLE_SIZE          Token ring RIF cache size (tunable)
+AARP_HASH_SIZE          Size of Appletalk hash table (tunable)
+AX25_DEF_T1             AX.25 parameters. These are all tunable via
+AX25_DEF_T2             SIOCAX25SETPARMS
+AX25_DEF_T3             T1-T3,N2 have the meanings in the specification
+AX25_DEF_N2
+AX25_DEF_AXDEFMODE      8 = normal 128 is PE1CHL extended
+AX25_DEF_IPDEFMODE      'D' - datagram  'V' - virtual connection
+AX25_DEF_BACKOFF        'E'xponential 'L'inear
+AX25_DEF_NETROM         Allow netrom 1=Y
+AX25_DF_TEXT            Allow PID=Text 1=Y
+AX25_DEF_WINDOW         Window for normal mode
+AX25_DEF_EWINDOW        Window for PE1CHL mode
+AX25_DEF_DIGI           1 for inband 2 for cross band 3 for both
+AX25_DEF_CONMODE        Allow connected modes 1=Yes
+AX25_ROUTE_MAX          AX.25 route cache size - no currently tunable
+Unnamed (16)            Number of protocol hash slots (tunable)
+DEV_NUMBUFFS            Number of priority levels (not easily tunable)
+Unnamed (300)           Maximum packet backlog queue (tunable)
+MAX_IOVEC               Maximum number of iovecs in a message (tunable)
+MIN_WINDOW              Offered minimum window (tunable)
+MAX_WINDOW              Offered maximum window (tunable)
+MAX_HEADER              Largest physical header (tunable)
+MAX_ADDR_LEN            Largest physical address (tunable)
+SOCK_ARRAY_SIZE         IP socket array hash size (tunable)
+IP_MAX_MEMBERSHIPS      Largest number of groups per socket (BSD style) (tunable)
+16                      Hard coded constant for amount of room allowed for
+                        cache align and faster forwarding (tunable)
+IP_FRAG_TIME            Time we hold a fragment for. (tunable)
+PORT_MASQ_BEGIN         First port reserved for masquerade (tunable)
+PORT_MASQ_END           Last port used for masquerade   (tunable)
+MASQUERADE_EXPIRE_TCP_FIN       Time we keep a masquerade for after a FIN
+MASQUERADE_EXPIRE_UDP   Time we keep a UDP masquerade for (tunable)
+MAXVIFS                 Maximum mrouted vifs (1-32)
+MFC_LINES               Lines in the multicast router cache (tunable)
+
+NetROM parameters are tunable via an ioctl passing a struct
+
+4000                    Size a Unix domain socket malloc falls back to 
+                        (tunable) should be 8K - a bit for 8K machines like
+                        the ALPHA
+