Hi all,
> 21 sep 2015 kl. 15:53 skrev Palle Girgensohn <gir...@freebsd.org>: > >> >> 21 sep 2015 kl. 10:21 skrev Julien Charbon <j...@freebsd.org>: >> >> >> Hi Konstantin, Hi Palle, >> >> On 18/09/15 18:06, Konstantin Belousov wrote: >>> On Fri, Sep 18, 2015 at 03:56:25PM +0200, Julien Charbon wrote: >>>> Hi Palle, >>>> >>>> On 18/09/15 11:12, Palle Girgensohn wrote: >>>>> We see daily panics on our production systems (web server, apache >>>>> running MPM event, openjdk8. Kernel with VIMAGE. Jails using netgraph >>>>> interfaces [not epair]). >>>>> >>>>> The problem started after the summer. Normal port upgrades seems to >>>>> be the only difference. The problem occurs with 10.2-p2 kernel as >>>>> well as 10.1-p4 and 10.1-p15. >>>>> >>>>> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203175 >>>>> >>>>> Any ideas? >>>> >>>> Thanks for you detailed report. I am not aware of any tcp_twclose() >>>> related issues (without VIMAGE) since FreeBSD 10.0 (does not mean there >>>> are none). Few interesting facts (at least for me): >>>> >>>> - Your crash happens when unlocking a inp exclusive lock with INP_WUNLOCK() >>>> >>>> - Something is already wrong before calling turnstile_broadcast() as it >>>> is called with ts = NULL: >>> In the kernel without witness this is a 99%-sure indication of attempt to >>> unlock not owned lock. >> >> Thanks, this is useful. So far I did not find any path where >> tcp_twclose() can call INP_WUNLOCK without having the exclusive lock >> held, that makes this issue interesting. >> >>>> I won't go to far here as I am not expert enough in VIMAGE, but one >>>> question anyway: >>>> >>>> - Can you correlate this kernel panic to a particular event? Like for >>>> example a VIMAGE/VNET jail destruction. >>>> >>>> I will test that on my side on a 10.2 machine. >> >> I did not find any issues while testing 10.2 + VIMAGE on my side. Thus >> Palle what I would suggest: >> >> - First, test with stable/10 to see if by chance this issue has already >> been fixed in stable branch. >> >> - Second, if issue is still in stable/10, compile 10.2 kernel with >> these options: >> >> options DDB >> options DEADLKRES >> options INVARIANTS >> options INVARIANT_SUPPORT >> options WITNESS >> options WITNESS_SKIPSPIN >> >> To see where the original fault is coming from. > > Hi, > > We just had two crashes within 15 minutes using 10.2 with these two added: > > https://svnweb.freebsd.org/changeset/base/287261 > > https://svnweb.freebsd.org/changeset/base/287780 > > We don't always get a core dump, but the second time, we did. > > very similar stack trace, but not identical: > > (kgdb) #0 doadump (textdump=<value optimized out>) at pcpu.h:219 > #1 0xffffffff80949a82 in kern_reboot (howto=260) > at /usr/src/sys/kern/kern_shutdown.c:451 > #2 0xffffffff80949e65 in vpanic (fmt=<value optimized out>, > ap=<value optimized out>) at /usr/src/sys/kern/kern_shutdown.c:758 > #3 0xffffffff80949cf3 in panic (fmt=0x0) > at /usr/src/sys/kern/kern_shutdown.c:687 > #4 0xffffffff80d5d0bb in trap_fatal (frame=<value optimized out>, > eva=<value optimized out>) at /usr/src/sys/amd64/amd64/trap.c:851 > #5 0xffffffff80d5d3bd in trap_pfault (frame=0xfffffe1760bc1840, > usermode=<value optimized out>) at /usr/src/sys/amd64/amd64/trap.c:674 > #6 0xffffffff80d5ca5a in trap (frame=0xfffffe1760bc1840) > at /usr/src/sys/amd64/amd64/trap.c:440 > #7 0xffffffff80d42dd2 in calltrap () > at /usr/src/sys/amd64/amd64/exception.S:236 > #8 0xffffffff8099861c in turnstile_broadcast (ts=0x0, queue=1) > at /usr/src/sys/kern/subr_turnstile.c:838 > #9 0xffffffff80948100 in __rw_wunlock_hard (c=0xfffff811c43487a0, tid=1, > file=0x1 <Address 0x1 out of bounds>, line=1) > at /usr/src/sys/kern/kern_rwlock.c:988 > #10 0xffffffff80b067c4 in tcp_twclose (tw=<value optimized out>, > reuse=<value optimized out>) at /usr/src/sys/netinet/tcp_timewait.c:540 > #11 0xffffffff80b06e0b in tcp_tw_2msl_scan (reuse=0) > at /usr/src/sys/netinet/tcp_timewait.c:748 > #12 0xffffffff80b04b0e in tcp_slowtimo () > at /usr/src/sys/netinet/tcp_timer.c:198 > #13 0xffffffff809b7a04 in pfslowtimo (arg=0x0) > at /usr/src/sys/kern/uipc_domain.c:508 > #14 0xffffffff8095f91b in softclock_call_cc (c=0xffffffff81620bf0, > cc=0xffffffff8169dc00, direct=0) at /usr/src/sys/kern/kern_timeout.c:685 > #15 0xffffffff8095fd44 in softclock (arg=0xffffffff8169dc00) > at /usr/src/sys/kern/kern_timeout.c:814 > #16 0xffffffff8091592b in intr_event_execute_handlers ( > p=<value optimized out>, ie=0xfffff801102e0d00) > at /usr/src/sys/kern/kern_intr.c:1264 > #17 0xffffffff80915d76 in ithread_loop (arg=0xfffff801102adee0) > at /usr/src/sys/kern/kern_intr.c:1277 > #18 0xffffffff8091347a in fork_exit ( > callout=0xffffffff80915ce0 <ithread_loop>, arg=0xfffff801102adee0, > frame=0xfffffe1760bc1c00) at /usr/src/sys/kern/kern_fork.c:1018 > #19 0xffffffff80d4330e in fork_trampoline () > at /usr/src/sys/amd64/amd64/exception.S:611 > #20 0x0000000000000000 in ?? () > > > > I'll try stable/10 now. Would you suggest a "clean" stable/10, or could > 287621 and 287780 help? > > I'll add the debugging suggested options right away. > > Palle I have a new core dump from ^/stable/10 with: options DDB options DEADLKRES options INVARIANTS options INVARIANT_SUPPORT options WITNESS options WITNESS_SKIPSPIN What can I do with the core dump? "corrupt stack"... (kgdb) #0 doadump (textdump=1) at pcpu.h:219 #1 0xffffffff8094b337 in kern_reboot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:451 #2 0xffffffff8094b845 in vpanic (fmt=<value optimized out>, ap=<value optimized out>) at /usr/src/sys/kern/kern_shutdown.c:758 #3 0xffffffff8094b6d9 in kassert_panic (fmt=<value optimized out>) at /usr/src/sys/kern/kern_shutdown.c:646 #4 0xffffffff80b1ee59 in tcp_usr_detach (so=<value optimized out>) at /usr/src/sys/netinet/tcp_usrreq.c:202 #5 0xffffffff809cd291 in sofree (so=0xfffff801dd302000) at /usr/src/sys/kern/uipc_socket.c:747 #6 0xffffffff809cdb00 in soclose (so=<value optimized out>) at /usr/src/sys/kern/uipc_socket.c:849 #7 0xffffffff808fe659 in _fdrop (fp=0xfffff802a593db40, td=0x0) at file.h:343 #8 0xffffffff80901092 in closef (fp=0xfffff802a593db40, td=0xfffff80eebc894a0) at /usr/src/sys/kern/kern_descrip.c:2338 #9 0xffffffff808feb5d in closefp (fdp=0xfffff80b20cce000, fd=<value optimized out>, fp=0xfffff802a593db40, td=0xfffff80eebc894a0, holdleaders=<value optimized out>) at /usr/src/sys/kern/kern_descrip.c:1194 #10 0xffffffff80d7bc3a in amd64_syscall (td=0xfffff80eebc894a0, traced=0) at subr_syscall.c:134 #11 0xffffffff80d5f1db in Xfast_syscall () at /usr/src/sys/amd64/amd64/exception.S:396 #12 0x0000000801c8d94a in ?? () Previous frame inner to this frame (corrupt stack?) Current language: auto; currently minimal (kgdb) Thanks, Palle _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
