D25133.id73568.diff
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	Index: sys/netinet/cc/cc_cubic.c
	===================================================================
	--- sys/netinet/cc/cc_cubic.c
	+++ sys/netinet/cc/cc_cubic.c
	@@ -313,10 +313,15 @@
	* timeout has fired more than once, as there is a reasonable
	* chance the first one is a false alarm and may not indicate
	* congestion.
	+ * This will put Cubic firmly into the concave / TCP friendly
	+ * region, for a slower ramp-up after two consecutive RTOs.
	*/
	if (CCV(ccv, t_rxtshift) >= 2) {
	cubic_data->flags \|= CUBICFLAG_CONG_EVENT;
	cubic_data->t_last_cong = ticks;
	+ cubic_data->max_cwnd = CCV(ccv, snd_cwnd_prev);
	+ cubic_data->K = cubic_k(cubic_data->max_cwnd /
	+ CCV(ccv, t_maxseg));
	}
	break;
	}