Index: sys/dev/e1000/if_igb.h
===================================================================
--- sys/dev/e1000/if_igb.h
+++ sys/dev/e1000/if_igb.h
@@ -355,7 +355,6 @@
 	volatile u16		tx_avail;
 	u16			next_avail_desc;
 	u16			next_to_clean;
-	u16			process_limit;
 	u16			num_desc;
 	enum {
 	    IGB_QUEUE_IDLE = 1,
@@ -534,6 +533,7 @@
 	int			has_manage;
 	int			wol;
 	int			rx_process_limit;
+	int			tx_process_limit;
 	u16			vf_ifp;  /* a VF interface */
 	bool			in_detach; /* Used only in igb_ioctl */
 
Index: sys/dev/e1000/if_igb.c
===================================================================
--- sys/dev/e1000/if_igb.c
+++ sys/dev/e1000/if_igb.c
@@ -336,6 +336,12 @@
     &igb_rx_process_limit, 0,
     "Maximum number of received packets to process at a time, -1 means unlimited");
 
+/* How many packets txeof tries to clean at a time */
+static int igb_tx_process_limit = -1;
+SYSCTL_INT(_hw_igb, OID_AUTO, tx_process_limit, CTLFLAG_RDTUN,
+    &igb_tx_process_limit, 0,
+    "Maximum number of sent packets to process at a time, -1 means unlimited");
+
 #ifdef DEV_NETMAP	/* see ixgbe.c for details */
 #include <dev/netmap/if_igb_netmap.h>
 #endif /* DEV_NETMAP */
@@ -453,11 +459,15 @@
 
 	e1000_get_bus_info(&adapter->hw);
 
-	/* Sysctl for limiting the amount of work done in the taskqueue */
+	/* Sysctls for limiting the amount of work done in the taskqueues */
 	igb_set_sysctl_value(adapter, "rx_processing_limit",
 	    "max number of rx packets to process",
 	    &adapter->rx_process_limit, igb_rx_process_limit);
 
+	igb_set_sysctl_value(adapter, "tx_processing_limit",
+	    "max number of tx packets to process",
+	    &adapter->tx_process_limit, igb_tx_process_limit);
+
 	/*
 	 * Validate number of transmit and receive descriptors. It
 	 * must not exceed hardware maximum, and must be multiple
@@ -3970,7 +3980,7 @@
 	struct ifnet		*ifp = adapter->ifp;
 #endif /* DEV_NETMAP */
 	u32			work, processed = 0;
-	u16			limit = txr->process_limit;
+	int			limit = adapter->tx_process_limit;
 	struct igb_tx_buf	*buf;
 	union e1000_adv_tx_desc *txd;