[PATCH net-next] net: ipv4: Optimize check_leaf function
From: <hidden>
Date: 2012-08-28 08:53:07
Subsystem:
networking [general], networking [ipv4/ipv6], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds
From: Igor Maravic <redacted> If the found tos is smaller then our tos, don't pass through all the entries in fib_alias list to find the match. Directly jump to the last entry in the list, and check if the tos value is 0. Signed-off-by: Igor Maravic <redacted> --- net/ipv4/fib_trie.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index 3c820da..ec45621 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c@@ -1366,8 +1366,14 @@ static int check_leaf(struct fib_table *tb, struct trie *t, struct leaf *l, struct fib_info *fi = fa->fa_info; int nhsel, err; - if (fa->fa_tos && fa->fa_tos != flp->flowi4_tos) - continue; + if (fa->fa_tos && fa->fa_tos != flp->flowi4_tos) { + if (fa->fa_tos < flp->flowi4_tos) { + fa = list_entry_rcu(li->falh.prev, struct fib_alias, fa_list); + if (fa->fa_tos) + break; + } else + continue; + } if (fi->fib_dead) continue; if (fa->fa_info->fib_scope < flp->flowi4_scope)
--
1.7.9.5