mouse@Rodents.Montreal.QC.CA wrote:

> > Hmm, is there any actual protocal which could create "slightly (i.e.
> > 1 or 2) larger than our MTU"?
> 
> An NFS(-over-UDP) read of a suitably sized file can do it - as,
> presumably, can an NFS write of a suitably sized chunk of data.

With a quick grance, NFS UDP packets seem rounded to multiples
of 4 bytes, but certain UDP protocols actually have odd bytes.

I'll commit the workaround for the ex(4) ip4csum-tx bug
if there is no objection in a few days.
---
Izumi Tsutsui