Re: panic: tcp_do_segment: sent too much
Michael Tuexen <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.net |
|---|---|
| Message-ID | <[email protected]> |
> On 13. Jan 2025, at 02:50, Zhenlei Huang <[email protected]> wrote: > > > >> On Jan 13, 2025, at 9:44 AM, Kyle Evans <[email protected]> wrote: >> >> Hi, >> >> I seem to have hit this panic during normal laptop usage with a -CURRENT running at 2832af7b4ea256b18ef4dbf2ff97a50765f0609a: >> >> panic: tcp_do_segment: sent too much >> cpuid = 5 >> time = 1736731772 >> KDB: stack backtrace: >> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe015b74b9b0 >> vpanic() at vpanic+0x136/frame 0xfffffe015b74bae0 >> panic() at panic+0x43/frame 0xfffffe015b74bb40 >> tcp_do_segment() at tcp_do_segment+0x2998/frame 0xfffffe015b74bc20 >> tcp_input_with_port() at tcp_input_with_port+0x10f8/frame 0xfffffe015b74bd70 >> tcp_input() at tcp_input+0xb/frame 0xfffffe015b74bd80 >> ip_input() at ip_input+0x28f/frame 0xfffffe015b74bde0 >> swi_net() at swi_net+0x19b/frame 0xfffffe015b74be60 >> ithread_loop() at ithread_loop+0x266/frame 0xfffffe015b74bef0 >> fork_exit() at fork_exit+0x82/frame 0xfffffe015b74bf30 >> fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe015b74bf30 >> >> Doing a little bit of inspection: >> >> (kgdb) print tp->t_dupacks >> $1 = 1 >> (kgdb) print tp->snd_limited >> $6 = 0 '\000' >> (kgdb) p/x tp->t_flags >> $4 = 0x10000264 >> (kgdb) print maxseg >> $1 = 1428 >> >> `sent` appears to be optimized out. As far as I know, I don't hit this one often, but I'm wondering if there's anything else useful I could extract here / if anyone has a theory about what happened. > > I also hit this. When I ssh to my dev machine ( 15.0-CURRENT ) and run the build, it happens sometimes. It appears to be easy repeated with busy tcp traffic. See my response to Kyle... Best regards Michael > >> >> Thanks, >> >> Kyle Evans >> > > > >