IIRC, there was a memory leak in the em driver for 8.0. That and a
bunch of other improvments
to the em driver have happened since then so
you may want to give 8-STABLE a go.
After some googling, I think I've found the problem: bug kern/144330, recently
fixed in 8-stable.
I think it's
I'm running 8.0-release on a Supermicro X7SPA-H with dual GbE. I have
the two interfaces bridged (using if_bridge) with em0 connected to my
PC and em1 to a 100Mb router.
After days of uptime, em1 will suddenly stop responding to anything. I
cannot ping it from the router, and I cannot ping the
