diff options
| -rw-r--r-- | target/linux/bcm53xx/patches-5.10/600-net-disable-GRO-by-default.patch | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/target/linux/bcm53xx/patches-5.10/600-net-disable-GRO-by-default.patch b/target/linux/bcm53xx/patches-5.10/600-net-disable-GRO-by-default.patch new file mode 100644 index 0000000000..506e6f5b99 --- /dev/null +++ b/target/linux/bcm53xx/patches-5.10/600-net-disable-GRO-by-default.patch @@ -0,0 +1,36 @@ +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 +@@ -231,10 +231,10 @@ static inline int find_next_netdev_feature(u64 feature, unsigned long start) + #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) ++#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_FRAGLIST ++#define NETIF_F_SOFT_FEATURES_OFF (NETIF_F_GRO_FRAGLIST | NETIF_F_GRO) + + #define NETIF_F_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_FILTER | \ + NETIF_F_HW_VLAN_CTAG_RX | \ |