On Sun, 23 Oct 2011, Lawrence Stewart wrote:
On 10/22/11 19:49, Pawel Jakub Dawidek wrote:
The panic message says:
panic: tcp_input negative window: tp 0xfffffe007763e000 rcv_nxt
3718269252 rcv_adv 3718268291
I only have picture of the backtrace:
http://people.freebsd.org/~pjd/misc/panic_negative_window.jpg
ewww that is not good. Can you give us any more information about the machine
and what it's doing? Is it terminating TCP connections from the internet at
large or only local LAN (i.e. is there likely to be packet loss happening)?
Are you doing TSO or LRO? Do you have any non-default tuning in place?
I can't speak for pjd@, but when this issue occured a couple months ago
for me, the system I had run into the issue with was doing packet
forwarding via ipfw from an internal NAT via ipfw to a corporate network.
The system was using bce(4) on the internal and external interface.
Thanks,
-Garrett
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