[Bug 229167] [Hyper-V] [Jun 19, 2018] Recently FreeBSD VM panics during boot-up, especially with Mellanox VF configured

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=229167

--- Comment #26 from pete at twisted.org.uk ---
More tests - I built a ZFS machine as D16s_v3 - that boots fine. Then I resized
both of them back to D4s_v3. The UFS machine now boots (which it didn't at that
size before) but the ZFS machine doesn't.

So its looking like either a race condition (so the number of CPU's makes a
difference) or some dependency on the underlying hardware (as the resize may
move to a different host presumably?)

Either way its depressingly inconsistent :-( Once it happens its reproducible
though.

Do you need me to do any more testing ?

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