Re: 9.0-RC1 panic in tcp_input: negative winow.
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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