[Bug 205163] Periodic jobs triggering panics on ZFS host with jails

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205163

--- Comment #9 from karl at denninger.net ---
(In reply to Andriy Gapon from comment #8)

That sysctl was not declared as settable only in loader.conf; it was (and is)
runtime tunable.  That which can be changed at runtime the base code had better
handle if modified asynchronously.

What's in the dump appears to be inconsistent; the panic claims to be on an
attempt to perform integer division by zero, but the divisor (on examination)
is not zero.

Since the output of that calculation is an expected delay time, however,
correcting it so that no division takes place if that condition arises should
be effective, provided that the panic is actually what was represented. I'm
skeptical due to the above, but it's simple enough to find out -- thus what I
sent to the author (and posted over on the ARC bug as well this morning.)

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