From ea7dfc872e1597a74ff3597c03bfc97185046c98 Mon Sep 17 00:00:00 2001
From: Hoang Tran <tranviethoang.vn@gmail.com>
Date: Wed, 27 Sep 2017 18:30:58 +0200
Subject: [PATCH] tcp: fix under-evaluated ssthresh in TCP Vegas
Git-commit: cf5d74b85ef40c202c76d90959db4d850f301b95
Patch-mainline: v4.15-rc1
References: git-fixes
With the commit 76174004a0f19785 (tcp: do not slow start when cwnd equals
ssthresh), the comparison to the reduced cwnd in tcp_vegas_ssthresh() would
under-evaluate the ssthresh.
Signed-off-by: Hoang Tran <hoang.tran@uclouvain.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Denis Kirjanov <denis.kirjanov@suse.com>
---
net/ipv4/tcp_vegas.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv4/tcp_vegas.c b/net/ipv4/tcp_vegas.c
index 218cfcc77650..ee113ff15fd0 100644
--- a/net/ipv4/tcp_vegas.c
+++ b/net/ipv4/tcp_vegas.c
@@ -158,7 +158,7 @@ EXPORT_SYMBOL_GPL(tcp_vegas_cwnd_event);
static inline u32 tcp_vegas_ssthresh(struct tcp_sock *tp)
{
- return min(tp->snd_ssthresh, tp->snd_cwnd-1);
+ return min(tp->snd_ssthresh, tp->snd_cwnd);
}
static void tcp_vegas_cong_avoid(struct sock *sk, u32 ack, u32 acked)
--
2.16.4