netdev - RE: ixgbe and SRIOV failure in driver?

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Date:	Fri, 21 May 2010 12:18:18 -0700
From:	"Rose, Gregory V" <gregory.v.rose@...el.com>
To:	"Fischer, Anna" <anna.fischer@...com>,
	"e1000-devel@...ts.sourceforge.net" 
	<e1000-devel@...ts.sourceforge.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: ixgbe and SRIOV failure in driver?

>-----Original Message-----
>From: netdev-owner@...r.kernel.org [mailto:netdev-owner@...r.kernel.org]
>On Behalf Of Fischer, Anna
>Sent: Friday, May 21, 2010 9:33 AM
>To: e1000-devel@...ts.sourceforge.net; netdev@...r.kernel.org
>Subject: ixgbe and SRIOV failure in driver?
>
>I am running a system with 3 Intel NICs. Two of them are 82598 devices,
>and one is a SRIOV capable 82599.
>
>All devices use the ixgbe driver. What happens (I believe) now is that
>when the driver loads at first, it sees the 82598 first (because of its
>position in the PCI tree) and then it says "Device not IOV capable -
>switching off IOV."
>
>So then it switches into non-IOV mode, and I can never enable SRIOV on
>my 82599, because the driver does not enable it any more for further
>devices.
>
>So to get around this issue, I tried to use pciback.hide to hide the
>82598 devices from the OS. That way I was hoping that the driver would
>switch on SRIOV on my 82599. However, then I got a kernel panic on boot
>(see below).
>
>I am running Xen 4 and the Dom0 kernel is a 2.6.31 kernel.

The ixgbe driver included with the 2.6.31 kernel does not support SR-IOV.
Where did you get the driver that does?  Please run ethtool -i <ethx> and
post the results.

- Greg Rose
Intel Corp.
Lan Access Division

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