EM Driver problems

[Patrick Domack]

I have been using fxp network based cards, without issues. I have recently 
changed over to em cards, and get kernel panics about once every few days 
with them (mainly sbdrop panics). I already have nsfclusters set to 32k, 
and freebsd vm memory 
set to 850megs, with 4g memory installed.

After playing adjusting things and not making any noticable improvements,
I upgraded the default freebsd em driver from 1.7 to the 2.0 version on
intels website. This seemed to fix things for awhile, lastest two weeks 
before any problems happened, at witch time the card/driver stopped 
recieving/sending packets. I am still looking into exactly what happened 
here.