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Diffstat (limited to 'net/ipv4/tcp_output.c')
-rw-r--r--net/ipv4/tcp_output.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index f33c9dddaa1..07bb5a2b375 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -59,6 +59,9 @@ int sysctl_tcp_tso_win_divisor = 3;
59int sysctl_tcp_mtu_probing = 0; 59int sysctl_tcp_mtu_probing = 0;
60int sysctl_tcp_base_mss = 512; 60int sysctl_tcp_base_mss = 512;
61 61
62/* By default, RFC2861 behavior. */
63int sysctl_tcp_slow_start_after_idle = 1;
64
62static void update_send_head(struct sock *sk, struct tcp_sock *tp, 65static void update_send_head(struct sock *sk, struct tcp_sock *tp,
63 struct sk_buff *skb) 66 struct sk_buff *skb)
64{ 67{
@@ -138,7 +141,8 @@ static void tcp_event_data_sent(struct tcp_sock *tp,
138 struct inet_connection_sock *icsk = inet_csk(sk); 141 struct inet_connection_sock *icsk = inet_csk(sk);
139 const u32 now = tcp_time_stamp; 142 const u32 now = tcp_time_stamp;
140 143
141 if (!tp->packets_out && (s32)(now - tp->lsndtime) > icsk->icsk_rto) 144 if (sysctl_tcp_slow_start_after_idle &&
145 (!tp->packets_out && (s32)(now - tp->lsndtime) > icsk->icsk_rto))
142 tcp_cwnd_restart(sk, __sk_dst_get(sk)); 146 tcp_cwnd_restart(sk, __sk_dst_get(sk));
143 147
144 tp->lsndtime = now; 148 tp->lsndtime = now;