On Mon, Oct 27, 2014 at 1:16 PM, Heiner Kallweit <heiner.kallweit@xxxxxx> wrote: > Thanks, Lucas. > > It's interesting however that the igb driver claims it's using MSI-X. > Maybe the DW PCIE drivers offers MSI-X on the bus and just internally falls back to MSI? > > Rgds, Heiner > > [ 4.165850] igb: Intel(R) Gigabit Ethernet Network Driver - version 5.2.15-k > [ 4.172930] igb: Copyright (c) 2007-2014 Intel Corporation. > [ 4.178638] igb 0000:01:00.0: enabling device (0140 -> 0142) > [ 4.235789] igb 0000:01:00.0: added PHC on eth0 > [ 4.235793] igb 0000:01:00.0: Intel(R) Gigabit Ethernet Network Connection > [ 4.235799] igb 0000:01:00.0: eth0: (PCIe:2.5Gb/s:Width x1) 00:01:c0:14:b1:58 > [ 4.235804] igb 0000:01:00.0: eth0: PBA No: FFFFFF-0FF > [ 4.235810] igb 0000:01:00.0: Using MSI-X interrupts. 2 rx queue(s), 2 tx queue(s) What does "lspci -vvs01:00.0" say? It *looks* like igb pays attention to whether enabling MSI-X worked, but that path in the driver is not completely trivial, and I got tired of tracing the code to verify it. Bjorn -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
