As I'd recently posted on -current, I've been noticing TCP oddities in
3.3 and 3.4. I've got a pn card (NetGear FA310tx) and a few new things
to report:
- Invariably, a TCP connection will freeze with something in the send
queue. Connections don't freeze even if there's something in the
receive queue.
- tcpdump-ing the pn0 interface shows that the host thinks that it's
sending data. tcpdump-ing elsewhere in the network shows that pn0
isn't actually transmitting anything into the wire.
- This really is a TCP or interface bug because NFS connections don't
freeze using UDP.
- Other TCP connections continue to operate (like a cvsup in the
background)
I haven't stared at the if_pn.c code all that closely but I'm willing
to entertain debugging suggestions.
-scooter
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