[CentOS-virt] Xen HVM Networking in 3.10

[Johnny Hughes]

On 01/19/2014 05:44 AM, Chris Elliott wrote:
>
> Is anyone running lots of Xen HVM guests on a 3.10 Dom0 kernel?
>
> We’ve had a few weird issues where PV guests are fine, but HVM guests
> are getting < 1Kb/s network throughput. The configuration on the host
> machine, VIF and inside the VM is fine. CPU and IO is fine too.
>
> It only seems to affect servers with Broadcom network chipsets.
> Rolling back to a 3.4 Dom0 kernel fixes the problem, so its either
> driver (bnx2?) related or something else.
>
> Not sure what to look at next to troubleshoot this as there are no
> errors anywhere, but if anyone has a test server with a brodcom NIC
> please can you test?
>
> We’ve had this on 3 production servers now, but I cant really do any
> more testing on those as they are full of active VMs.
>
>


Can you see if it uses the same firmware in both kernels? And which file
does it use for firmware for the nic.

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