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	Index: sys/net/iflib.c
	===================================================================
	--- sys/net/iflib.c
	+++ sys/net/iflib.c
	@@ -586,8 +586,11 @@
	static int iflib_no_tx_batch = 0;
	SYSCTL_INT(_net_iflib, OID_AUTO, no_tx_batch, CTLFLAG_RW,
	&iflib_no_tx_batch, 0, "minimize transmit latency at the possible expense of throughput");
	+int iflib_tx_update_freq = IFLIB_DEFAULT_TX_UPDATE_FREQ;
	+SYSCTL_UINT(_net_iflib, OID_AUTO, tx_update_freq, CTLFLAG_RWTUN,
	+ &iflib_tx_update_freq, IFLIB_DEFAULT_TX_UPDATE_FREQ,
	+ "tramsmit descriptor updates per second");

	-
	#if IFLIB_DEBUG_COUNTERS

	static int iflib_tx_seen;
	@@ -1768,8 +1771,7 @@

	/* Set number of descriptors available */
	txq->ift_qstatus = IFLIB_QUEUE_IDLE;
	- /* XXX make configurable */
	- txq->ift_update_freq = IFLIB_DEFAULT_TX_UPDATE_FREQ;
	+ txq->ift_update_freq = iflib_tx_update_freq;

	/* Reset indices */
	txq->ift_cidx_processed = 0;