36546de92f
This is an automatically generated commit which aids following Kernel patch history, as git will see the move and copy as a rename thus defeating the purpose. For the original discussion see: https://lists.openwrt.org/pipermail/openwrt-devel/2023-October/041673.html Signed-off-by: Rosen Penev <rosenp@gmail.com> Link: https://github.com/openwrt/openwrt/pull/23166 Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
37 lines
1.5 KiB
Diff
37 lines
1.5 KiB
Diff
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
|
|
Date: Mon, 20 Jun 2022 10:01:18 +0200
|
|
Subject: [PATCH] net: disable GRO by default
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
In many cases GRO improves network performance however it comes at a
|
|
cost of chacksums calculations. In case of slow CPU and missing hardware
|
|
csum calculation support GRO can actually decrease network speed.
|
|
|
|
On BCM4708 *disabling* GRO results in following NAT masquarade speed
|
|
changes:
|
|
1. 364 Mb/s → 396 Mb/s (packet steering disabled)
|
|
2. 341 Mb/s → 566 Mb/s (packet steering enabled)
|
|
|
|
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
|
|
---
|
|
include/linux/netdev_features.h | 4 ++--
|
|
1 file changed, 2 insertions(+), 2 deletions(-)
|
|
|
|
--- a/include/linux/netdev_features.h
|
|
+++ b/include/linux/netdev_features.h
|
|
@@ -235,10 +235,10 @@ static inline int find_next_netdev_featu
|
|
#define NETIF_F_UPPER_DISABLES NETIF_F_LRO
|
|
|
|
/* changeable features with no special hardware requirements */
|
|
-#define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO | NETIF_F_GRO_FRAGLIST)
|
|
+#define NETIF_F_SOFT_FEATURES (NETIF_F_GSO)
|
|
|
|
/* Changeable features with no special hardware requirements that defaults to off. */
|
|
-#define NETIF_F_SOFT_FEATURES_OFF (NETIF_F_GRO_UDP_FWD)
|
|
+#define NETIF_F_SOFT_FEATURES_OFF (NETIF_F_GRO_UDP_FWD | NETIF_F_GRO | NETIF_F_GRO_FRAGLIST)
|
|
|
|
#define NETIF_F_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_FILTER | \
|
|
NETIF_F_HW_VLAN_CTAG_RX | \
|