diff options
| author | Stephen Hemminger <shemminger@vyatta.com> | 2008-04-10 01:54:01 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-04-10 01:54:01 -0700 |
| commit | 1294fc4a4868d7e83ff749597fbf4e9d5f4d1aa0 (patch) | |
| tree | 164465f16a896a40c04ed8398498809bb7d1e918 /net | |
| parent | 5969f71d57928511b9cd8744aaf1ed9bc5e88ea2 (diff) | |
IPV4: route use jhash3
Since route hash is a triple, use jhash_3words rather doing the mixing
directly. This should be as fast and give better distribution.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/route.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index d758ea1d80f..7cdd2bf88e0 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -259,16 +259,14 @@ static DEFINE_PER_CPU(struct rt_cache_stat, rt_cache_stat); #define RT_CACHE_STAT_INC(field) \ (__raw_get_cpu_var(rt_cache_stat).field++) -static unsigned int rt_hash_code(u32 daddr, u32 saddr) +static inline unsigned int rt_hash(__be32 daddr, __be32 saddr, int idx) { - return jhash_2words(daddr, saddr, atomic_read(&rt_genid)) + return jhash_3words((__force u32)(__be32)(daddr), + (__force u32)(__be32)(saddr), + idx, atomic_read(&rt_genid)) & rt_hash_mask; } -#define rt_hash(daddr, saddr, idx) \ - rt_hash_code((__force u32)(__be32)(daddr),\ - (__force u32)(__be32)(saddr) ^ ((idx) << 5)) - #ifdef CONFIG_PROC_FS struct rt_cache_iter_state { struct seq_net_private p; |