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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2009-10-09 00:16:19 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-10-13 03:44:02 -0700 |
| commit | f373b53b5fe67aa4a6f28f921a529cc90f88e79b (patch) | |
| tree | b2cae9152aed2e30b7a39c114678b9355ab5c14f /net/dccp/proto.c | |
| parent | c3faca053d0a9c877597935b434150b422dbc6fb (diff) | |
| download | linux-f373b53b5fe67aa4a6f28f921a529cc90f88e79b.tar.bz2 | |
tcp: replace ehash_size by ehash_mask
Storing the mask (size - 1) instead of the size allows fast path to be
a bit faster.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp/proto.c')
| -rw-r--r-- | net/dccp/proto.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/net/dccp/proto.c b/net/dccp/proto.c index a156319fd0ac..ecb203fff501 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -1060,11 +1060,12 @@ static int __init dccp_init(void) for (ehash_order = 0; (1UL << ehash_order) < goal; ehash_order++) ; do { - dccp_hashinfo.ehash_size = (1UL << ehash_order) * PAGE_SIZE / + unsigned long hash_size = (1UL << ehash_order) * PAGE_SIZE / sizeof(struct inet_ehash_bucket); - while (dccp_hashinfo.ehash_size & - (dccp_hashinfo.ehash_size - 1)) - dccp_hashinfo.ehash_size--; + + while (hash_size & (hash_size - 1)) + hash_size--; + dccp_hashinfo.ehash_mask = hash_size - 1; dccp_hashinfo.ehash = (struct inet_ehash_bucket *) __get_free_pages(GFP_ATOMIC|__GFP_NOWARN, ehash_order); } while (!dccp_hashinfo.ehash && --ehash_order > 0); @@ -1074,7 +1075,7 @@ static int __init dccp_init(void) goto out_free_bind_bucket_cachep; } - for (i = 0; i < dccp_hashinfo.ehash_size; i++) { + for (i = 0; i <= dccp_hashinfo.ehash_mask; i++) { INIT_HLIST_NULLS_HEAD(&dccp_hashinfo.ehash[i].chain, i); INIT_HLIST_NULLS_HEAD(&dccp_hashinfo.ehash[i].twchain, i); } @@ -1153,7 +1154,7 @@ static void __exit dccp_fini(void) get_order(dccp_hashinfo.bhash_size * sizeof(struct inet_bind_hashbucket))); free_pages((unsigned long)dccp_hashinfo.ehash, - get_order(dccp_hashinfo.ehash_size * + get_order((dccp_hashinfo.ehash_mask + 1) * sizeof(struct inet_ehash_bucket))); inet_ehash_locks_free(&dccp_hashinfo); kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); |