From 7acedaf5c4355f812cfef883ac28bf15f7d9205e Mon Sep 17 00:00:00 2001
From: Eric Dumazet <edumazet@google.com>
Date: Tue, 25 Apr 2017 11:36:52 -0700
Subject: [PATCH] net: move xdp_prog field in RX cache lines
(struct net_device, xdp_prog) field should be moved in RX cache lines,
reducing latencies when a single packet is received on idle host,
since netif_elide_gro() needs it.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/linux/netdevice.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 46d220c2bf92c..8c5c8cdc7b977 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1790,6 +1790,7 @@ struct net_device {
unsigned int real_num_rx_queues;
#endif
+ struct bpf_prog __rcu *xdp_prog;
unsigned long gro_flush_timeout;
rx_handler_func_t __rcu *rx_handler;
void __rcu *rx_handler_data;
@@ -1905,7 +1906,6 @@ struct net_device {
struct lock_class_key *qdisc_tx_busylock;
struct lock_class_key *qdisc_running_key;
bool proto_down;
- struct bpf_prog __rcu *xdp_prog;
};
#define to_net_dev(d) container_of(d, struct net_device, dev)
--
2.30.2