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Re: [Xen-devel] no-carrier on qlogic 8242 10gig with linux 3.x running xen

  • To: xen-devel@xxxxxxxxxxxxxxxxxxx
  • From: Kristoffer Harthing Egefelt <k@xxxxxxx>
  • Date: Wed, 23 May 2012 02:40:04 -0700 (PDT)
  • Delivery-date: Wed, 23 May 2012 09:40:18 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xen.org>

> Any luck?

>Actually after finding out about the pci=nomsi kernel parameter, I have not
had any problems.
>Regarding the firmware upgrade, qlogic and dell need a supported OS to run
their diag tools on, I'm tired of >dealing with them, so I have not gathered
this info yet.
>Didn't try to downgrade the driver either.
>But I'm about to try pci passthrough, to have 10gig directly in the domU.
>I'll let you know if it works.

The pci=nomsi actually seems to create problems for us when using pci
We could not get more than 2.5 Gbit from a domU, using netback/netfront.
It was suggested that we use pci passthrough to get the full 10Gbit.
However dom0 and domU crashes periodically with: 

kernel irq 60: nobody cared (try booting with the "irqpoll" option) 
kernel Pid: 0, comm: swapper Not tainted

Booting with irqpoll has no effect.

So I tried to upgrade the firmware on the qlogic cards to 1.09.22 - no
Qlogic's latest firmware is 1.09.65 - but is not installable on the DELL oem
I was not able to downgrade the qlogic driver in linux 3.2 to 5.0.24 from
5.0.25 as suggested in this thread, the driver will not compile - struct
dev_mc_list is no longer defined in netdevice.h.

As far as I can tell the pci=nomsi disables the irq handling needed for pci
Could someone confirm this?
Could someone also clarify if this is a qlogic driver issue or a xen issue.


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