1 files changed, 9 insertions, 1 deletions

diff --git a/net/dccp/ccids/ccid2.c b/net/dccp/ccids/ccid2.c
index 0462040fc818..b51cc92376da 100644
--- a/net/dccp/ccids/ccid2.c
+++ b/net/dccp/ccids/ccid2.c
@@ -494,8 +494,16 @@ static void ccid2_hc_tx_packet_recv(struct sock *sk, struct sk_buff *skb)
                         if (hc->tx_rpdupack >= NUMDUPACK) {
                                 hc->tx_rpdupack = -1; /* XXX lame */
                                 hc->tx_rpseq    = 0;
-
+#ifdef __CCID2_COPES_GRACEFULLY_WITH_ACK_CONGESTION_CONTROL__
+                                /*
+                                 * FIXME: Ack Congestion Control is broken; in
+                                 * the current state instabilities occurred with
+                                 * Ack Ratios greater than 1; causing hang-ups
+                                 * and long RTO timeouts. This needs to be fixed
+                                 * before opening up dynamic changes. -- gerrit
+                                 */
                                 ccid2_change_l_ack_ratio(sk, 2 * dp->dccps_l_ack_ratio);
+#endif
                         }
                 }
         }