https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219216

--- Comment #1 from Konstantin Belousov <k...@freebsd.org> ---
The description of the problem is not very useful.

When the panic 'spinlock held too long' occurs, presumably for the sched locks,
catch exact kernel messages (same as you did) and also the backtrace for the
thread which is reported as the owner of the spinlock.  I will see if more
information is needed after that.

Note that if CPU speed is artificially reduced, then spinlock sections might
take much longer time to execute, which would, in turn, trigger the detector
for the stuck spinlock.  I do not claim that this is your case, but it could
be.

sched_bind() does not depend on rnd.

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