net: struct xfrm_tunnel in read_mostly section
Eric Dumazet [Mon, 30 Aug 2010 07:04:14 +0000 (07:04 +0000)]
tunnel4_handlers chain being scanned for each incoming packet,
make sure it doesnt share an often dirtied cache line.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/ipip.c
net/ipv4/tunnel4.c
net/ipv4/xfrm4_tunnel.c
net/ipv6/sit.c

index ec03673..3c6f8f3 100644 (file)
@@ -744,7 +744,7 @@ static void __net_init ipip_fb_tunnel_init(struct net_device *dev)
        ipn->tunnels_wc[0]      = tunnel;
 }
 
-static struct xfrm_tunnel ipip_handler = {
+static struct xfrm_tunnel ipip_handler __read_mostly = {
        .handler        =       ipip_rcv,
        .err_handler    =       ipip_err,
        .priority       =       1,
index 59186ca..942f02d 100644 (file)
@@ -14,8 +14,8 @@
 #include <net/protocol.h>
 #include <net/xfrm.h>
 
-static struct xfrm_tunnel *tunnel4_handlers;
-static struct xfrm_tunnel *tunnel64_handlers;
+static struct xfrm_tunnel *tunnel4_handlers __read_mostly;
+static struct xfrm_tunnel *tunnel64_handlers __read_mostly;
 static DEFINE_MUTEX(tunnel4_mutex);
 
 static inline struct xfrm_tunnel **fam_handlers(unsigned short family)
index 41f5982..8280645 100644 (file)
@@ -58,14 +58,14 @@ static int xfrm_tunnel_err(struct sk_buff *skb, u32 info)
        return -ENOENT;
 }
 
-static struct xfrm_tunnel xfrm_tunnel_handler = {
+static struct xfrm_tunnel xfrm_tunnel_handler __read_mostly = {
        .handler        =       xfrm_tunnel_rcv,
        .err_handler    =       xfrm_tunnel_err,
        .priority       =       2,
 };
 
 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
-static struct xfrm_tunnel xfrm64_tunnel_handler = {
+static struct xfrm_tunnel xfrm64_tunnel_handler __read_mostly = {
        .handler        =       xfrm_tunnel_rcv,
        .err_handler    =       xfrm_tunnel_err,
        .priority       =       2,
index 4699cd3..86618eb 100644 (file)
@@ -1132,7 +1132,7 @@ static void __net_init ipip6_fb_tunnel_init(struct net_device *dev)
        sitn->tunnels_wc[0]     = tunnel;
 }
 
-static struct xfrm_tunnel sit_handler = {
+static struct xfrm_tunnel sit_handler __read_mostly = {
        .handler        =       ipip6_rcv,
        .err_handler    =       ipip6_err,
        .priority       =       1,