From 06a34f7db773e01efa8a90c5b4d912207a80dd60 Mon Sep 17 00:00:00 2001 From: Daniel Borkmann Date: Sun, 17 Nov 2024 22:20:30 +0100 Subject: [PATCH] wireguard: device: support big tcp GSO Advertise GSO_MAX_SIZE as TSO max size in order support BIG TCP for wireguard. This helps to improve wireguard performance a bit when enabled as it allows wireguard to aggregate larger skbs in wg_packet_consume_data_done() via napi_gro_receive(), but also allows the stack to build larger skbs on xmit where the driver then segments them before encryption inside wg_xmit(). We've seen a 15% improvement in TCP stream performance. Signed-off-by: Daniel Borkmann Signed-off-by: Jason A. Donenfeld Link: https://patch.msgid.link/20241117212030.629159-5-Jason@zx2c4.com Signed-off-by: Jakub Kicinski --- drivers/net/wireguard/device.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/wireguard/device.c b/drivers/net/wireguard/device.c index a2ba71fbbed4..6cf173a008e7 100644 --- a/drivers/net/wireguard/device.c +++ b/drivers/net/wireguard/device.c @@ -302,6 +302,8 @@ static void wg_setup(struct net_device *dev) /* We need to keep the dst around in case of icmp replies. */ netif_keep_dst(dev); + netif_set_tso_max_size(dev, GSO_MAX_SIZE); + wg->dev = dev; }