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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 <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2012-10-21 20:12:09 +00:00 committed by David S. Miller
parent 0e71c55c9e
commit d94ce9b283
1 changed files with 1 additions and 1 deletions
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2
net/ipv4/fib_semantics.c
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@ -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);