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>
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@ -259,16 +259,14 @@ static DEFINE_PER_CPU(struct rt_cache_stat, rt_cache_stat);
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#define RT_CACHE_STAT_INC(field) \
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(__raw_get_cpu_var(rt_cache_stat).field++)
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static unsigned int rt_hash_code(u32 daddr, u32 saddr)
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static inline unsigned int rt_hash(__be32 daddr, __be32 saddr, int idx)
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{
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return jhash_2words(daddr, saddr, atomic_read(&rt_genid))
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return jhash_3words((__force u32)(__be32)(daddr),
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(__force u32)(__be32)(saddr),
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idx, atomic_read(&rt_genid))
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& rt_hash_mask;
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}
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#define rt_hash(daddr, saddr, idx) \
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rt_hash_code((__force u32)(__be32)(daddr),\
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(__force u32)(__be32)(saddr) ^ ((idx) << 5))
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#ifdef CONFIG_PROC_FS
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struct rt_cache_iter_state {
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struct seq_net_private p;
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