Date: Sat, 22 Oct 2011 22:10:52 -0700 (PDT) From: Garrett Cooper <yanegomi@gmail.com> To: Lawrence Stewart <lstewart@freebsd.org> Cc: freebsd-net@freebsd.org, Andre Oppermann <andre@freebsd.org>, freebsd-current@freebsd.org, Pawel Jakub Dawidek <pjd@freebsd.org> Subject: Re: 9.0-RC1 panic in tcp_input: negative winow. Message-ID: <alpine.BSF.2.00.1110222208550.38610@toaster.local> In-Reply-To: <4EA36F53.9050907@freebsd.org> References: <20111022084931.GD1697@garage.freebsd.pl> <4EA36F53.9050907@freebsd.org>
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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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