I'm trying to enable RX multiqueue on igb 2.0.6 driver for Intel
82575GB (modprobe igb IntMode=3) on my CentOS 5.4 32-bit (2.6.30.9) Dual
Quad-core Xeon but it gives me this error "Invalid Interrupt Mode value"
then falls back to mode 2, MSI-X single RX queue.
============
Intel(R) Gigabit Ethernet Network Driver - version 2.0.6
Copyright (c) 2007-2009 Intel Corporation.
igb 0000:07:00.0: PCI INT A -> GSI 45 (level, low) -> IRQ 45
igb 0000:07:00.0: setting latency timer to 64
igb: 0000:07:00.0: igb_validate_option: Invalid Interrupt Mode value
specified (3) defaulting to 2 (MSI-X)
igb 0000:07:00.0: irq 65 for MSI/MSI-X
igb 0000:07:00.0: irq 66 for MSI/MSI-X
igb: eth0: igb_probe: DCA enabled
igb: eth0: igb_probe: Intel(R) Gigabit Ethernet Network Connection
igb: eth0: igb_probe: (PCIe:2.5Gb/s:Width x4) 00:1b:21:43:c6:30
igb: eth0: igb_probe: Using MSI-X interrupts. 1 rx queue(s), 1 tx queue(s)
============
I checked http://downloadmirror.intel.com/13663/eng/README.txt, IntMode
valid range is only 0-2:
============
IntMode
-------
Valid Range: 0-2
Default Value: 2
0 - Legacy Interrupts, single queue
1 - MSI interrupts, single queue
2 - MSI-X interrupts, single queue (default)
3 - MSI-X interrupts, multiple queues
Allows changing interrupt mode and MQ status at load time, without requiring
a recompile. If the driver fails to enable a specific interrupt mode, it
will
fail back to lesser capabilities.
===========
Can anyone share some idea what could be wrong?
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