| Message ID | 20240329154225.349288-9-edumazet@google.com (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | net: rps: misc changes | expand |
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 14f19cc2616452d7e6afbbaa52f8ad3e61a419e9..274d8db48b4858c70b43ea4628544e924ba6a263 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -3203,6 +3203,7 @@ struct softnet_data { struct softnet_data *rps_ipi_list; #endif + unsigned int received_rps; bool in_net_rx_action; bool in_napi_threaded_poll; @@ -3235,7 +3236,6 @@ struct softnet_data { unsigned int cpu; unsigned int input_queue_tail; #endif - unsigned int received_rps; struct sk_buff_head input_pkt_queue; struct napi_struct backlog;
Commit 14d898f3c1b3 ("dev: Move received_rps counter next to RPS members in softnet data") was unfortunate: received_rps is dirtied by a cpu and never read by other cpus in fast path. Its presence in the hot RPS cache line (shared by many cpus) is hurting RPS/RFS performance. Signed-off-by: Eric Dumazet <edumazet@google.com> --- include/linux/netdevice.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)