netdev - [PATCH net-next] net: tcp: refresh tcp_mstamp for compressed ack in timer

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Message-Id: <20241003082231.759759-1-dongml2@chinatelecom.cn>
Date: Thu,  3 Oct 2024 16:22:31 +0800
From: Menglong Dong <menglong8.dong@...il.com>
To: edumazet@...gle.com
Cc: davem@...emloft.net,
	dsahern@...nel.org,
	kuba@...nel.org,
	pabeni@...hat.com,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Menglong Dong <dongml2@...natelecom.cn>
Subject: [PATCH net-next] net: tcp: refresh tcp_mstamp for compressed ack in timer

For now, we refresh the tcp_mstamp for delayed acks and keepalives, but
not for the compressed ack in tcp_compressed_ack_kick().

I have not found out the effact of the tcp_mstamp when sending ack, but
we can still refresh it for the compressed ack to keep consistent.

Signed-off-by: Menglong Dong <dongml2@...natelecom.cn>
---
 net/ipv4/tcp_timer.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c
index 79064580c8c0..1f37a37f9c82 100644
--- a/net/ipv4/tcp_timer.c
+++ b/net/ipv4/tcp_timer.c
@@ -851,6 +851,7 @@ static enum hrtimer_restart tcp_compressed_ack_kick(struct hrtimer *timer)
 			 * LINUX_MIB_TCPACKCOMPRESSED accurate.
 			 */
 			tp->compressed_ack--;
+			tcp_mstamp_refresh(tp);
 			tcp_send_ack(sk);
 		}
 	} else {
-- 
2.39.5