On Thu, Nov 16, 2006 at 03:41:46PM +0100, Christoph Kaegi wrote:
> > 
> > Did you enable ip4, tcp4 and udp4 checksums on your wm adapters ? This
> > can help a lot.
> > 
> 
> No I didn't. Can I do that online while the machine is running
> without risking it going belly-up?

Of course.  You should also enable segmentation offload, if you haven't
already done so.

What value of HZ are you using?  Perhaps things are backing up because
the softnet processing is not happening often enough?

Thor