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[NETFILTER]: nf_conntrack: use jhash2 in __hash_conntrack 

Now it uses jhash, but using jhash2 would be around 3-4 times faster
(on P4).

Signed-off-by: Sami Farin <safari-netfilter@safari.iki.fi>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sami Farin 2007-03-14 16:43:00 -07:00 committed by David S. Miller
parent 8e87e014ec
commit 9b88790972
1 changed files with 5 additions and 4 deletions
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9
net/netfilter/nf_conntrack_core.c
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@ -128,10 +128,11 @@ static u_int32_t __hash_conntrack(const struct nf_conntrack_tuple *tuple,
unsigned int size, unsigned int rnd) unsigned int size, unsigned int rnd)
{ {
unsigned int a, b; unsigned int a, b;
a = jhash((void *)tuple->src.u3.all, sizeof(tuple->src.u3.all),
((tuple->src.l3num) << 16) | tuple->dst.protonum); a = jhash2(tuple->src.u3.all, ARRAY_SIZE(tuple->src.u3.all),
b = jhash((void *)tuple->dst.u3.all, sizeof(tuple->dst.u3.all), (tuple->src.l3num << 16) | tuple->dst.protonum);
(tuple->src.u.all << 16) | tuple->dst.u.all); b = jhash2(tuple->dst.u3.all, ARRAY_SIZE(tuple->dst.u3.all),
(tuple->src.u.all << 16) | tuple->dst.u.all);
return jhash_2words(a, b, rnd) % size; return jhash_2words(a, b, rnd) % size;
} }