D27465.diff
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	Index: sys/net/iflib.c
	===================================================================
	--- sys/net/iflib.c
	+++ sys/net/iflib.c
	@@ -188,7 +188,8 @@
	struct sysctl_oid *ifc_sysctl_node;
	uint16_t ifc_sysctl_ntxqs;
	uint16_t ifc_sysctl_nrxqs;
	- uint16_t ifc_sysctl_qs_eq_override;
	+ uint8_t ifc_sysctl_qs_eq_override;
	+ uint8_t ifc_sysctl_rx_wait_irq;
	uint16_t ifc_sysctl_rx_budget;
	uint16_t ifc_sysctl_tx_abdicate;
	uint16_t ifc_sysctl_core_offset;
	@@ -2942,7 +2943,9 @@
	#if defined(INET6) \|\| defined(INET)
	tcp_lro_flush_all(&rxq->ifr_lc);
	#endif
	- if (avail != 0 \|\| iflib_rxd_avail(ctx, rxq, *cidxp, 1) != 0)
	+ if (avail != 0 \|\|
	+ (ctx->ifc_sysctl_rx_wait_irq == 0 &&
	+ iflib_rxd_avail(ctx, rxq, *cidxp, 1) != 0))
	retval \|= IFLIB_RXEOF_MORE;
	return (retval);
	err:
	@@ -6600,9 +6603,12 @@
	SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_nrxqs",
	CTLFLAG_RWTUN, &ctx->ifc_sysctl_nrxqs, 0,
	"# of rxqs to use, 0 => use default #");
	- SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_qs_enable",
	+ SYSCTL_ADD_U8(ctx_list, oid_list, OID_AUTO, "override_qs_enable",
	CTLFLAG_RWTUN, &ctx->ifc_sysctl_qs_eq_override, 0,
	"permit #txq != #rxq");
	+ SYSCTL_ADD_U8(ctx_list, oid_list, OID_AUTO, "rx_wait_irq",
	+ CTLFLAG_RWTUN, &ctx->ifc_sysctl_rx_wait_irq, 0,
	+ "rearm IRQ instead of looking for available RX descriptors at the end of rxeof");
	SYSCTL_ADD_INT(ctx_list, oid_list, OID_AUTO, "disable_msix",
	CTLFLAG_RWTUN, &ctx->ifc_softc_ctx.isc_disable_msix, 0,
	"disable MSI-X (default 0)");