From d94ce9b283736a876b2e6dec665c68e5e8b5d55e Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Sun, 21 Oct 2012 20:12:09 +0000 Subject: [PATCH] ipv4: 16 slots in initial fib_info hash table A small host typically needs ~10 fib_info structures, so create initial hash table with 16 slots instead of only one. This removes potential false sharing and reallocs/rehashes (1->2->4->8->16) Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/ipv4/fib_semantics.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c index 71b125cd5db1..4797a800faf8 100644 --- a/net/ipv4/fib_semantics.c +++ b/net/ipv4/fib_semantics.c @@ -803,7 +803,7 @@ struct fib_info *fib_create_info(struct fib_config *cfg) unsigned int bytes; if (!new_size) - new_size = 1; + new_size = 16; bytes = new_size * sizeof(struct hlist_head *); new_info_hash = fib_info_hash_alloc(bytes); new_laddrhash = fib_info_hash_alloc(bytes); -- 2.20.1