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Commit 93ac5341 authored by David S. Miller's avatar David S. Miller
Browse files

ipv4: Dirty less cache lines in route caching paths.



Don't bother incrementing dst->__use and setting dst->lastuse,
they are completely pointless and just slow things down.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ba3f7f04
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+3 −3
Original line number Diff line number Diff line
@@ -1443,7 +1443,7 @@ static int __mkroute_input(struct sk_buff *skb,
		if (!(flags & RTCF_DIRECTSRC) && !itag) {
			rth = FIB_RES_NH(*res).nh_rth_input;
			if (rt_cache_valid(rth)) {
				dst_use(&rth->dst, jiffies);
				dst_hold(&rth->dst);
				goto out;
			}
			do_cache = true;
@@ -1619,7 +1619,7 @@ local_input:
		if (!(flags & RTCF_DIRECTSRC) && !itag) {
			rth = FIB_RES_NH(res).nh_rth_input;
			if (rt_cache_valid(rth)) {
				dst_use(&rth->dst, jiffies);
				dst_hold(&rth->dst);
				goto set_and_out;
			}
			do_cache = true;
@@ -1789,7 +1789,7 @@ static struct rtable *__mkroute_output(const struct fib_result *res,
		if (!fnhe) {
			rth = FIB_RES_NH(*res).nh_rth_output;
			if (rt_cache_valid(rth)) {
				dst_use(&rth->dst, jiffies);
				dst_hold(&rth->dst);
				return rth;
			}
		}