D6841.diff
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	Index: head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
	===================================================================
	--- head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
	+++ head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c
	@@ -299,6 +299,12 @@
	SYSCTL_INT(_hw_hn, OID_AUTO, tx_swq_depth, CTLFLAG_RDTUN,
	&hn_tx_swq_depth, 0, "Depth of IFQ or BUFRING");

	+#if __FreeBSD_version >= 1100095
	+static u_int hn_lro_mbufq_depth = 0;
	+SYSCTL_UINT(_hw_hn, OID_AUTO, lro_mbufq_depth, CTLFLAG_RDTUN,
	+ &hn_lro_mbufq_depth, 0, "Depth of LRO mbuf queue");
	+#endif
	+
	static u_int hn_cpu_index;

	/*
	@@ -1283,6 +1289,19 @@
	return (remainder == 0);
	}

	+#if defined(INET) \|\| defined(INET6)
	+static __inline int
	+hn_lro_rx(struct lro_ctrl lc, struct mbuf m)
	+{
	+#if __FreeBSD_version >= 1100095
	+ if (hn_lro_mbufq_depth) {
	+ tcp_lro_queue_mbuf(lc, m);
	+ return 0;
	+ }
	+#endif
	+ return tcp_lro_rx(lc, m, 0);
	+}
	+#endif

	/*
	* Called when we receive a data packet from the "wire" on the
	@@ -1488,7 +1507,7 @@

	if (lro->lro_cnt) {
	rxr->hn_lro_tried++;
	- if (tcp_lro_rx(lro, m_new, 0) == 0) {
	+ if (hn_lro_rx(lro, m_new) == 0) {
	/* DONE! */
	return 0;
	}
	@@ -2223,7 +2242,8 @@
	*/
	#if defined(INET) \|\| defined(INET6)
	#if __FreeBSD_version >= 1100095
	- tcp_lro_init_args(&rxr->hn_lro, sc->hn_ifp, lroent_cnt, 0);
	+ tcp_lro_init_args(&rxr->hn_lro, sc->hn_ifp, lroent_cnt,
	+ hn_lro_mbufq_depth);
	#else
	tcp_lro_init(&rxr->hn_lro);
	rxr->hn_lro.ifp = sc->hn_ifp;