From 89aef8921bfbac22f00e04f8450f6e447db13e42 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Tue, 17 Jul 2012 11:00:09 -0700 Subject: ipv4: Delete routing cache. The ipv4 routing cache is non-deterministic, performance wise, and is subject to reasonably easy to launch denial of service attacks. The routing cache works great for well behaved traffic, and the world was a much friendlier place when the tradeoffs that led to the routing cache's design were considered. What it boils down to is that the performance of the routing cache is a product of the traffic patterns seen by a system rather than being a product of the contents of the routing tables. The former of which is controllable by external entitites. Even for "well behaved" legitimate traffic, high volume sites can see hit rates in the routing cache of only ~%10. Signed-off-by: David S. Miller --- include/net/route.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include/net') diff --git a/include/net/route.h b/include/net/route.h index ace3cb442519..5dcfeb621e06 100644 --- a/include/net/route.h +++ b/include/net/route.h @@ -109,7 +109,6 @@ extern struct ip_rt_acct __percpu *ip_rt_acct; struct in_device; extern int ip_rt_init(void); extern void rt_cache_flush(struct net *net, int how); -extern void rt_cache_flush_batch(struct net *net); extern struct rtable *__ip_route_output_key(struct net *, struct flowi4 *flp); extern struct rtable *ip_route_output_flow(struct net *, struct flowi4 *flp, struct sock *sk); -- cgit v1.2.1