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: turnstile_broadcast (ts=0x0, queue=1) at /usr/src/sys/kern/subr_turnstile.c:838 __rw_wunlock_hard () at /usr/src/sys/kern/kern_rwlock.c:988 tcp_twclose () at /usr/src/sys/netinet/tcp_timewait.c:540 tcp_tw_2msl_scan () at /usr/src/sys/netinet/tcp_timewait.c:748 tcp_slowtimo () at /usr/src/sys/netinet/tcp_timer.c:198 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. -- Julien
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