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authorDavid S. Miller <davem@davemloft.net>2011-02-01 15:15:39 -0800
committerDavid S. Miller <davem@davemloft.net>2011-02-01 15:35:25 -0800
commit3630b7c050d9c3564f143d595339fc06b888d6f3 (patch)
tree6c6144205d92e745303d79d136b0baed4b385193 /net/ipv4/Kconfig
parent2ba451421b23636c45fabfa522858c5c124b3673 (diff)
downloadop-kernel-dev-3630b7c050d9c3564f143d595339fc06b888d6f3.zip
op-kernel-dev-3630b7c050d9c3564f143d595339fc06b888d6f3.tar.gz
ipv4: Remove fib_hash.
The time has finally come to remove the hash based routing table implementation in ipv4. FIB Trie is mature, well tested, and I've done an audit of it's code to confirm that it implements insert, delete, and lookup with the same identical semantics as fib_hash did. If there are any semantic differences found in fib_trie, we should simply fix them. I've placed the trie statistic config option under advanced router configuration. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Diffstat (limited to 'net/ipv4/Kconfig')
-rw-r--r--net/ipv4/Kconfig38
1 files changed, 1 insertions, 37 deletions
diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
index 8949a05..cbb505b 100644
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -55,45 +55,9 @@ 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 ASK_IP_FIB_HASH
-
-config ASK_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 algorithm.
- 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.csc.kth.se/~snilsson/software/dyntrie2/>
-
-endchoice
-
-config IP_FIB_HASH
- def_bool ASK_IP_FIB_HASH || !IP_ADVANCED_ROUTER
-
config IP_FIB_TRIE_STATS
bool "FIB TRIE statistics"
- depends on IP_FIB_TRIE
+ depends on IP_ADVANCED_ROUTER
---help---
Keep track of statistics on structure of FIB TRIE table.
Useful for testing and measuring TRIE performance.
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