Re: [net PATCH] net: virtio: cap mtu when XDP programs are running

On Tue, Jan 10, 2017 at 04:51:34AM +0200, Michael S. Tsirkin wrote:

XDP seems to have a bunch of weird restrictions, I just
do not like it that the logic spills out to all drivers.
What if someone decides to extend it to two pages in the future?
Recode it all in all drivers ...

Why can't net core enforce mtu?

And BTW limits on MTU are a problem that will have to be
addressed sooner or later, disabling offloads on the NIC
is one thing, but reconfiguring all of the network
with a lower MTU is another.

-- 
MST