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kernel: improve GRO performance

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For packets not belonging to a local socket, use fraglist GRO instead of
regular GRO. This make segmenting packets very cheap and avoids the need for
selectively disabling GRO

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau
2024-04-23 12:37:05 +02:00
parent 98834a4c3f
commit b5c53848c3
12 changed files with 1133 additions and 318 deletions
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24
target/linux/generic/hack-6.6/600-net-enable-fraglist-GRO-by-default.patch Normal file
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@@ -0,0 +1,24 @@
From: Felix Fietkau <nbd@nbd.name>
Date: Tue, 23 Apr 2024 12:35:21 +0200
Subject: [PATCH] net: enable fraglist GRO by default
This can significantly improve performance for packet forwarding/bridging
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- a/include/linux/netdev_features.h
+++ b/include/linux/netdev_features.h
@@ -242,10 +242,10 @@ 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)
+#define NETIF_F_SOFT_FEATURES (NETIF_F_GSO | NETIF_F_GRO | NETIF_F_GRO_FRAGLIST)
/* Changeable features with no special hardware requirements that defaults to off. */
-#define NETIF_F_SOFT_FEATURES_OFF (NETIF_F_GRO_FRAGLIST | NETIF_F_GRO_UDP_FWD)
+#define NETIF_F_SOFT_FEATURES_OFF (NETIF_F_GRO_UDP_FWD)
#define NETIF_F_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_FILTER | \
NETIF_F_HW_VLAN_CTAG_RX | \

8
target/linux/generic/hack-6.6/721-net-add-packet-mangeling.patch
View File

@@ -47,7 +47,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
const struct header_ops *header_ops;
unsigned char operstate;
@@ -2259,6 +2266,10 @@ struct net_device {
@@ -2257,6 +2264,10 @@ struct net_device {
struct mctp_dev __rcu *mctp_ptr;
#endif
@@ -60,7 +60,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
*/
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -3081,6 +3081,10 @@ static inline int pskb_trim(struct sk_bu
@@ -3080,6 +3080,10 @@ static inline int pskb_trim(struct sk_bu
return (len < skb->len) ? __pskb_trim(skb, len) : 0;
}
@@ -71,7 +71,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
/**
* pskb_trim_unique - remove end from a paged unique (not cloned) buffer
* @skb: buffer to alter
@@ -3246,16 +3250,6 @@ static inline struct sk_buff *dev_alloc_
@@ -3245,16 +3249,6 @@ static inline struct sk_buff *dev_alloc_
}
@@ -152,7 +152,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
{
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -171,6 +171,12 @@ __be16 eth_type_trans(struct sk_buff *sk
@@ -159,6 +159,12 @@ __be16 eth_type_trans(struct sk_buff *sk
const struct ethhdr *eth;
skb->dev = dev;