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Code Issues Releases Wiki Activity

net-device: move xdp_prog to net_device_read_rx

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xdp_prog is used in receive path, both from XDP enabled drivers
and from netif_elide_gro().

This patch also removes two 4-bytes holes.

Fixes: 43a71cd66b ("net-device: reorganize net_device fast path variables")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Coco Li <lixiaoyan@google.com>
Cc: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240102162220.750823-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2024-01-02 16:22:20 +00:00 committed by Jakub Kicinski
parent a562a0272c
commit d3d344a1ca
3 changed files with 3 additions and 3 deletions
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2
Documentation/networking/net_cachelines/net_device.rst
View file

@ -96,7 +96,7 @@ unsigned_char* dev_addr
struct_netdev_queue* _rx read_mostly - netdev_get_rx_queue(rx)
unsigned_int num_rx_queues
unsigned_int real_num_rx_queues - read_mostly get_rps_cpu
struct_bpf_prog* xdp_prog
struct_bpf_prog* xdp_prog - read_mostly netif_elide_gro()
unsigned_long gro_flush_timeout - read_mostly napi_complete_done
int napi_defer_hard_irqs - read_mostly napi_complete_done
unsigned_int gro_max_size - read_mostly skb_gro_receive

2
include/linux/netdevice.h
View file

@ -2150,6 +2150,7 @@ struct net_device {
/* RX read-mostly hotpath */
__cacheline_group_begin(net_device_read_rx);
struct bpf_prog __rcu *xdp_prog;
struct list_head ptype_specific;
int ifindex;
unsigned int real_num_rx_queues;
@ -2325,7 +2326,6 @@ struct net_device {
const unsigned char *dev_addr;
unsigned int num_rx_queues;
struct bpf_prog __rcu *xdp_prog;
#define GRO_LEGACY_MAX_SIZE 65536u
/* TCP minimal MSS is 8 (TCP_MIN_GSO_SIZE),
* and shinfo->gso_segs is a 16bit field.

2
net/core/dev.c
View file

@ -11670,7 +11670,7 @@ static void __init net_dev_struct_check(void)
#ifdef CONFIG_NET_XGRESS
CACHELINE_ASSERT_GROUP_MEMBER(struct net_device, net_device_read_rx, tcx_ingress);
#endif
CACHELINE_ASSERT_GROUP_SIZE(struct net_device, net_device_read_rx, 96);
CACHELINE_ASSERT_GROUP_SIZE(struct net_device, net_device_read_rx, 104);
}
/*