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-rw-r--r--net/ipv4/tcp_input.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index f030435e0eb4..9785df37a65f 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -755,7 +755,15 @@ void tcp_update_metrics(struct sock *sk)
755 } 755 }
756} 756}
757 757
758/* Numbers are taken from RFC2414. */ 758/* Numbers are taken from RFC3390.
759 *
760 * John Heffner states:
761 *
762 * The RFC specifies a window of no more than 4380 bytes
763 * unless 2*MSS > 4380. Reading the pseudocode in the RFC
764 * is a bit misleading because they use a clamp at 4380 bytes
765 * rather than use a multiplier in the relevant range.
766 */
759__u32 tcp_init_cwnd(struct tcp_sock *tp, struct dst_entry *dst) 767__u32 tcp_init_cwnd(struct tcp_sock *tp, struct dst_entry *dst)
760{ 768{
761 __u32 cwnd = (dst ? dst_metric(dst, RTAX_INITCWND) : 0); 769 __u32 cwnd = (dst ? dst_metric(dst, RTAX_INITCWND) : 0);