[net-next PATCH 2/5] net: Call sk_mark_napi_id() in the ACK receive path

Alexander Duyck
2017-03-16T18:33:49Z

From: Sridhar Samudrala <sridhar.samudrala@intel.com>

Call sk_mark_napi_id() in the ACK receive path of a TCP_NEW_SYN_RECV
socket, so that sk->napi_id is set even if the socket hasn't yet received
any data. With this change we should be able to start busy polling
slightly earlier.

Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
---
net/ipv4/tcp_ipv4.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 08d870e45658..b86002a296f1 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1687,6 +1687,7 @@ int tcp_v4_rcv(struct sk_buff *skb)
tcp_v4_send_reset(nsk, skb);
goto discard_and_relse;
} else {
+ sk_mark_napi_id(nsk, skb);
sock_put(sk);
return 0;
}