openwrt-owl/target/linux/generic-2.6/patches-2.6.25/950-revert_conntrack_optimization.patch

Index: linux-2.6.25.1/net/netfilter/nf_conntrack_core.c
===================================================================
--- linux-2.6.25.1.orig/net/netfilter/nf_conntrack_core.c
+++ linux-2.6.25.1/net/netfilter/nf_conntrack_core.c
@@ -73,19 +73,15 @@ static unsigned int nf_conntrack_hash_rn
 static u_int32_t __hash_conntrack(const struct nf_conntrack_tuple *tuple,
 				  unsigned int size, unsigned int rnd)
 {
-	unsigned int n;
-	u_int32_t h;
+	unsigned int a, b;
 
-	/* The direction must be ignored, so we hash everything up to the
-	 * destination ports (which is a multiple of 4) and treat the last
-	 * three bytes manually.
-	 */
-	n = (sizeof(tuple->src) + sizeof(tuple->dst.u3)) / sizeof(u32);
-	h = jhash2((u32 *)tuple, n,
-		   rnd ^ (((__force __u16)tuple->dst.u.all << 16) |
-			  tuple->dst.protonum));
+	a = jhash2(tuple->src.u3.all, ARRAY_SIZE(tuple->src.u3.all),
+		   (tuple->src.l3num << 16) | tuple->dst.protonum);
+	b = jhash2(tuple->dst.u3.all, ARRAY_SIZE(tuple->dst.u3.all),
+		   ((__force __u16)tuple->src.u.all << 16) |
+		    (__force __u16)tuple->dst.u.all);
 
-	return ((u64)h * size) >> 32;
+	return ((u64)jhash_2words(a, b, rnd) * size) >> 32;
 }
 
 static inline u_int32_t hash_conntrack(const struct nf_conntrack_tuple *tuple)