On Sun, Oct 23, 2011 at 08:10:38AM +0200, Pawel Jakub Dawidek wrote: > On Sun, Oct 23, 2011 at 12:35:15PM +1100, 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? > > It is my local file server. It is doing NFS and AFP over LAN and also > downloads files from the internet. It is triggered after few hours. > I changed the KASSERT() into printf() and added printing 'win' variable > and this is what got logged during the night: > > 05:16:24 tcp_input negative window: tp 0xfffffe0026772b70 rcv_nxt 1107827269 > rcv_adv 1107826256 win=242 > 05:16:29 tcp_input negative window: tp 0xfffffe0026772b70 rcv_nxt 1107833451 > rcv_adv 1107832977 win=880 > 05:16:41 tcp_input negative window: tp 0xfffffe0026772b70 rcv_nxt 1107849563 > rcv_adv 1107848860 win=639 > 05:20:02 tcp_input negative window: tp 0xfffffe0026772b70 rcv_nxt 1108108230 > rcv_adv 1108107331 win=567 > 05:24:30 tcp_input negative window: tp 0xfffffe0026772b70 rcv_nxt 1108433302 > rcv_adv 1108432272 win=974 > 05:24:46 tcp_input negative window: tp 0xfffffe0026772b70 rcv_nxt 1108450385 > rcv_adv 1108450060 win=751 > 05:26:44 tcp_input negative window: tp 0xfffffe0026772b70 rcv_nxt 1108574818 > rcv_adv 1108573851 win=71 > 05:28:03 tcp_input negative window: tp 0xfffffe0026772b70 rcv_nxt 1108654103 > rcv_adv 1108653166 win=0 > 05:28:43 tcp_input negative window: tp 0xfffffe0026772b70 rcv_nxt 1108692396 > rcv_adv 1108691451 win=0 > 05:30:06 tcp_input negative window: tp 0xfffffe0026772b70 rcv_nxt 1108781258 > rcv_adv 1108780372 win=235 > 05:35:05 tcp_input negative window: tp 0xfffffe0026772b70 rcv_nxt 1109067578 > rcv_adv 1109067335 win=663 > 05:37:03 tcp_input negative window: tp 0xfffffe0026772b70 rcv_nxt 1109180403 > rcv_adv 1109179411 win=0 > 05:41:03 tcp_input negative window: tp 0xfffffe0026772b70 rcv_nxt 1109428265 > rcv_adv 1109427375 win=170 > > And the systems seems to be fine. > > I'm happy to test patches, but one round would take 24h. > > My suggestion would be that if we won't be able to fix it before 9.0, > we should turn this assertion off, as the system seems to be able to > recover.
Shipped kernels have all assertions turned off.
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