D25065.diff
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	Index: head/sys/netinet/cc/cc_cubic.c
	===================================================================
	--- head/sys/netinet/cc/cc_cubic.c
	+++ head/sys/netinet/cc/cc_cubic.c
	@@ -94,6 +94,7 @@
	uint32_t flags;
	#define CUBICFLAG_CONG_EVENT 0x00000001 /* congestion experienced */
	#define CUBICFLAG_IN_SLOWSTART 0x00000002 /* in slow start */
	+#define CUBICFLAG_IN_APPLIMIT 0x00000004 /* application limited */
	/* Minimum observed rtt in ticks. */
	int min_rtt_ticks;
	/* Mean observed rtt between congestion epochs. */
	@@ -153,8 +154,10 @@
	cubic_data->t_last_cong = ticks - INT_MAX;
	}

	- if (cubic_data->flags & CUBICFLAG_IN_SLOWSTART) {
	- cubic_data->flags &= ~CUBICFLAG_IN_SLOWSTART;
	+ if (cubic_data->flags & (CUBICFLAG_IN_SLOWSTART \|
	+ CUBICFLAG_IN_APPLIMIT)) {
	+ cubic_data->flags &= ~(CUBICFLAG_IN_SLOWSTART \|
	+ CUBICFLAG_IN_APPLIMIT);
	cubic_data->t_last_cong = ticks;
	cubic_data->K = 0;
	}
	@@ -214,6 +217,9 @@
	CCV(ccv, t_maxseg));
	}
	}
	+ } else if (type == CC_ACK && !IN_RECOVERY(CCV(ccv, t_flags)) &&
	+ !(ccv->flags & CCF_CWND_LIMITED)) {
	+ cubic_data->flags \|= CUBICFLAG_IN_APPLIMIT;
	}
	}