path: root/net/TUNABLE
diff options
authorLinus Torvalds <>2005-04-16 15:20:36 -0700
committerLinus Torvalds <>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/TUNABLE
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'net/TUNABLE')
1 files changed, 50 insertions, 0 deletions
diff --git a/net/TUNABLE b/net/TUNABLE
new file mode 100644
index 000000000000..9913211f07a7
--- /dev/null
+++ b/net/TUNABLE
@@ -0,0 +1,50 @@
+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_T3 T1-T3,N2 have the meanings in the specification
+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