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| author | David S. Miller <davem@davemloft.net> | 2005-06-24 17:50:53 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-06-24 17:50:53 -0700 |
| commit | bb298ca3ce92574d57c4e49b329421425ea7d279 (patch) | |
| tree | ed45f9ece02a50e7c1adf78ca3fb2a53b0f0314a | |
| parent | f7704347a74fceaf79c89f8b8dbdd0111013e4d6 (diff) | |
| download | linux-bb298ca3ce92574d57c4e49b329421425ea7d279.tar.gz linux-bb298ca3ce92574d57c4e49b329421425ea7d279.tar.bz2 linux-bb298ca3ce92574d57c4e49b329421425ea7d279.zip | |
[IPV4]: Move FIB lookup algorithm choice under IP_ADVANCED_ROUTING
Most users need not be concerned with a complex choice of what
FIB lookup algorithm to use. So give them the safe default of
IP_FIB_HASH if IP_ADVANCED_ROUTING is disabled.
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv4/Kconfig | 64 |
1 files changed, 38 insertions, 26 deletions
diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig index 690e88ba2484..7bcfb84126d1 100644 --- a/net/ipv4/Kconfig +++ b/net/ipv4/Kconfig @@ -1,32 +1,6 @@ # # IP configuration # -choice - prompt "Choose IP: FIB lookup" - depends on INET - default IP_FIB_HASH - -config IP_FIB_HASH - bool "FIB_HASH" - ---help--- - Current FIB is very proven and good enough for most users. - -config IP_FIB_TRIE - bool "FIB_TRIE" - ---help--- - Use new experimental LC-trie as FIB lookup algoritm. - This improves lookup performance - - LC-trie is described in: - - IP-address lookup using LC-tries. Stefan Nilsson and Gunnar Karlsson - IEEE Journal on Selected Areas in Communications, 17(6):1083-1092, June 1999 - An experimental study of compression methods for dynamic tries - Stefan Nilsson and Matti Tikkanen. Algorithmica, 33(1):19-33, 2002. - http://www.nada.kth.se/~snilsson/public/papers/dyntrie2/ - -endchoice - config IP_MULTICAST bool "IP: multicasting" depends on INET @@ -79,6 +53,44 @@ config IP_ADVANCED_ROUTER If unsure, say N here. +choice + prompt "Choose IP: FIB lookup algorithm (choose FIB_HASH if unsure)" + depends on IP_ADVANCED_ROUTER + default IP_FIB_HASH + +config IP_FIB_HASH + bool "FIB_HASH" + ---help--- + Current FIB is very proven and good enough for most users. + +config IP_FIB_TRIE + bool "FIB_TRIE" + ---help--- + Use new experimental LC-trie as FIB lookup algoritm. + This improves lookup performance if you have a large + number of routes. + + LC-trie is a longest matching prefix lookup algorithm which + performs better than FIB_HASH for large routing tables. + But, it consumes more memory and is more complex. + + LC-trie is described in: + + IP-address lookup using LC-tries. Stefan Nilsson and Gunnar Karlsson + IEEE Journal on Selected Areas in Communications, 17(6):1083-1092, June 1999 + An experimental study of compression methods for dynamic tries + Stefan Nilsson and Matti Tikkanen. Algorithmica, 33(1):19-33, 2002. + http://www.nada.kth.se/~snilsson/public/papers/dyntrie2/ + +endchoice + +# If the user does not enable advanced routing, he gets the safe +# default of the fib-hash algorithm. +config IP_FIB_HASH + bool + depends on !IP_ADVANCED_ROUTER + default y + config IP_MULTIPLE_TABLES bool "IP: policy routing" depends on IP_ADVANCED_ROUTER |