Re: [Xen-users] bad network perfornance too many frags messages

[Alexis Pellicier <alexis.pellicier@xxxxxxxxxx>]

I did ethtool -K br0 sg off

and still have lots of (3 per seconds) "netfront: Too many frags" messages in the VM'slogs.

The problem occurs with the host connect at 1GB. If I connected to a 100Mb ports the VM's are ok.

2013/4/8 James Harper <james.harper@xxxxxxxxxxxxxxxx>

> Hi,
> With a 3.7.10 kernel from openssue 12.3 my paravirtualized vm got really
> poor network performances.
> and I'have this messages every half of a second in the logs:
> kernel netfront: Too many frags
>
> Any idea about what could be the cause and what test I can do?
>
> I've read something about MAX_SKB_FAGS and offloading but it is not that
> clear for me.
>

Does turning off scatter gather on the bridge help at all?

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxx
http://lists.xen.org/xen-users