1 files changed, 21 insertions, 6 deletions

diff --git a/sys/dev/ixgbe/if_ix.c b/sys/dev/ixgbe/if_ix.c
index c2bf573..ac5f93d 100644
--- a/sys/dev/ixgbe/if_ix.c
+++ b/sys/dev/ixgbe/if_ix.c
@@ -163,6 +163,8 @@ static void	ixgbe_add_device_sysctls(struct adapter *);
 static void     ixgbe_add_hw_stats(struct adapter *);
 
 /* Sysctl handlers */
+static void	ixgbe_set_sysctl_value(struct adapter *, const char *,
+		    const char *, int *, int);
 static int	ixgbe_set_flowcntl(SYSCTL_HANDLER_ARGS);
 static int	ixgbe_set_advertise(SYSCTL_HANDLER_ARGS);
 static int	ixgbe_sysctl_thermal_test(SYSCTL_HANDLER_ARGS);
@@ -436,6 +438,15 @@ ixgbe_attach(device_t dev)
 		goto err_out;
 	}
 
+	/* Sysctls for limiting the amount of work done in the taskqueues */
+	ixgbe_set_sysctl_value(adapter, "rx_processing_limit",
+	    "max number of rx packets to process",
+	    &adapter->rx_process_limit, ixgbe_rx_process_limit);
+
+	ixgbe_set_sysctl_value(adapter, "tx_processing_limit",
+	    "max number of tx packets to process",
+	&adapter->tx_process_limit, ixgbe_tx_process_limit);
+
 	/* Do descriptor calc and sanity checks */
 	if (((ixgbe_txd * sizeof(union ixgbe_adv_tx_desc)) % DBA_ALIGN) != 0 ||
 	    ixgbe_txd < MIN_TXD || ixgbe_txd > MAX_TXD) {
@@ -2695,9 +2706,6 @@ ixgbe_initialize_transmit_units(struct adapter *adapter)
 		/* Cache the tail address */
 		txr->tail = IXGBE_TDT(txr->me);
 
-		/* Set the processing limit */
-		txr->process_limit = ixgbe_tx_process_limit;
-
 		/* Disable Head Writeback */
 		switch (hw->mac.type) {
 		case ixgbe_mac_82598EB:
@@ -2907,9 +2915,6 @@ ixgbe_initialize_receive_units(struct adapter *adapter)
 		IXGBE_WRITE_REG(hw, IXGBE_RDH(i), 0);
 		IXGBE_WRITE_REG(hw, IXGBE_RDT(i), 0);
 
-		/* Set the processing limit */
-		rxr->process_limit = ixgbe_rx_process_limit;
-
 		/* Set the driver rx tail address */
 		rxr->tail =  IXGBE_RDT(rxr->me);
 	}
@@ -4219,6 +4224,16 @@ ixgbe_add_hw_stats(struct adapter *adapter)
 			"1024-1522 byte frames transmitted");
 }
 
+static void
+ixgbe_set_sysctl_value(struct adapter *adapter, const char *name,
+    const char *description, int *limit, int value)
+{
+	*limit = value;
+	SYSCTL_ADD_INT(device_get_sysctl_ctx(adapter->dev),
+	    SYSCTL_CHILDREN(device_get_sysctl_tree(adapter->dev)),
+	    OID_AUTO, name, CTLFLAG_RW, limit, value, description);
+}
+
 /*
 ** Set flow control using sysctl:
 ** Flow control values: