https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=244878
Jason A. Harmening <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |[email protected] --- Comment #3 from Jason A. Harmening <[email protected]> --- Not a lot to go on from the backtrace. One thing that can cause this panic is if a thread calls smp_rendezvous_cpus() with local interrupts disabled: if another thread holds smp_ipi_mtx and is trying to IPI the first thread's CPU, the two threads can livelock. It doesn't look like the timer callout+in6 route expiration path that panicked should ever call smp_rendezvous_cpus() with interrupts disabled, but I think it's also possible that this thread could have been the victim of two other threads that were livelocked. r357308 added a check to HEAD (INVARIANTS kernels only) that panics if a thread enters smp_rendezvous_cpus() with interrupts disabled. If this is at all reproducible, it might be worth trying a kernel with that check backported. Also worth noting: in6_mtutimo() was completely removed from HEAD in 355888. -- You are receiving this mail because: You are the assignee for the bug. _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-bugs To unsubscribe, send any mail to "[email protected]"
