diff --git a/sys/dev/cxgbe/adapter.h b/sys/dev/cxgbe/adapter.h
index 3db92d5380b3..2bb9fa0b52bb 100644
--- a/sys/dev/cxgbe/adapter.h
+++ b/sys/dev/cxgbe/adapter.h
@@ -646,6 +646,8 @@ struct adapter {
 	const char *last_op;
 	const void *last_op_thr;
 #endif
+
+	int sc_do_rxcopy;
 };
 
 #define ADAPTER_LOCK(sc)		mtx_lock(&(sc)->sc_lock)
diff --git a/sys/dev/cxgbe/t4_main.c b/sys/dev/cxgbe/t4_main.c
index e74c47a859f6..e29913c8d62c 100644
--- a/sys/dev/cxgbe/t4_main.c
+++ b/sys/dev/cxgbe/t4_main.c
@@ -4239,6 +4239,10 @@ t4_sysctls(struct adapter *sc)
 	oid = device_get_sysctl_tree(sc->dev);
 	c0 = children = SYSCTL_CHILDREN(oid);
 
+	sc->sc_do_rxcopy = 1;
+	SYSCTL_ADD_INT(ctx, children, OID_AUTO, "do_rx_copy", CTLFLAG_RW,
+	    &sc->sc_do_rxcopy, 1, "Do RX copy of small frames");
+
 	SYSCTL_ADD_INT(ctx, children, OID_AUTO, "nports", CTLFLAG_RD, NULL,
 	    sc->params.nports, "# of ports");
 
diff --git a/sys/dev/cxgbe/t4_sge.c b/sys/dev/cxgbe/t4_sge.c
index ba88e21c407d..f8e283d591d6 100644
--- a/sys/dev/cxgbe/t4_sge.c
+++ b/sys/dev/cxgbe/t4_sge.c
@@ -1447,7 +1447,7 @@ get_fl_payload1(struct adapter *sc, struct sge_fl *fl, uint32_t len_newbuf,
 
 		bus_dmamap_sync(fl->tag[sd->tag_idx], sd->map,
 		    BUS_DMASYNC_POSTREAD);
-		if (len < RX_COPY_THRESHOLD) {
+		if (sc->sc_do_rxcopy && (len < RX_COPY_THRESHOLD)) {
 #ifdef T4_PKT_TIMESTAMP
 			/* Leave room for a timestamp */
 			m0->m_data += 8;
@@ -1598,7 +1598,7 @@ get_fl_payload2(struct adapter *sc, struct sge_fl *fl, uint32_t len_newbuf,
 
 	bus_dmamap_sync(fl->tag[sd->tag_idx], sd->map, BUS_DMASYNC_POSTREAD);
 
-	if (len < RX_COPY_THRESHOLD) {
+	if (sc->sc_do_rxcopy && (len < RX_COPY_THRESHOLD)) {
 #ifdef T4_PKT_TIMESTAMP
 		/* Leave room for a timestamp */
 		m0->m_data += 8;