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authorYuchung Cheng <ycheng@google.com>2015-07-09 13:16:29 -0700
committerDavid S. Miller <davem@davemloft.net>2015-07-09 14:22:52 -0700
commit071d5080e33d6f24139e4213c2d9f97a2c21b602 (patch)
tree2dad35b407a5aef707769358a0cc61c43abf33fa /net/ipv4/tcp_metrics.c
parentnet: skb_defer_rx_timestamp should check for phydev before setting up classify (diff)
downloadlinux-dev-071d5080e33d6f24139e4213c2d9f97a2c21b602.tar.xz
linux-dev-071d5080e33d6f24139e4213c2d9f97a2c21b602.zip
tcp: add tcp_in_slow_start helper
Add a helper to test the slow start condition in various congestion control modules and other places. This is to prepare a slight improvement in policy as to exactly when to slow start. Signed-off-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Nandita Dukkipati <nanditad@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_metrics.c')
-rw-r--r--net/ipv4/tcp_metrics.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index a51d63a43e33..b3d64f61d922 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -461,7 +461,7 @@ void tcp_update_metrics(struct sock *sk)
tcp_metric_set(tm, TCP_METRIC_CWND,
tp->snd_cwnd);
}
- } else if (tp->snd_cwnd > tp->snd_ssthresh &&
+ } else if (!tcp_in_slow_start(tp) &&
icsk->icsk_ca_state == TCP_CA_Open) {
/* Cong. avoidance phase, cwnd is reliable. */
if (!tcp_metric_locked(tm, TCP_METRIC_SSTHRESH))