Re: [Xen-users] Trace SRIOV NIC's MSI-X delivery to Xen

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Tue, Mar 01, 2011 at 09:41:07AM -0800, David White wrote:
>
> On 02/21/2011 01:52 AM, Pasi Kärkkäinen wrote:
>> On Thu, Feb 10, 2011 at 04:51:01PM +0530, Manish Verma wrote:
>>> Hi all,
>>>
>>> I'm using Xen4.0.1 with SLES11SP1  with Intel's SRIOV NIC in passthrough
>>> mode to FedoraCore14 guest HVMs.
>>>  From guest HVM I'm able to send packets out but not able to receive the
>>> same.
>>> Intel NIC HW counters are reporting receiving packets but  the same is
>>> not reaching the guest HVM.
>>> My NIC uses MSI-X to report packets to SW. which should be received by
>>> Xen and forwarded to HVM guest where I don't see relevant
>>> /proc/interrupts counter ticking.
>>>
>>> Thus I would like to trace whether MSI-X requests are reaching Xen. Any
>>> known xen command to trace the same.
>>>
>>
>
> Did you ever find a solution to this?  I am currently seeing the same  
> behavior on my system.  Physical functions seem to work fine - interface  
> in HVM guest has full network access.  Virtual function does not work.   
> DHCP reqests from guest HVM are received at the DHCP server, responses  
> are returned, but the HVM never receives them.
>

I think this issue has been discussed on xen-devel mailinglist recently..
Afaik there's a fix available for this.

-- Pasi


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