[Bug 212721] FreeBSD 11.0-RC3 fails on Hyper-V 2012r2

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212721

--- Comment #41 from Terrence Koeman <terrence at darkness-reigns.net> ---
Created attachment 175289
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=175289&action=edit
Lock order reversal on 11-STABLE with proposed patch applied

(In reply to Dexuan Cui from comment #37)

I've made the changes you recommended, and I'm noticing frequent lock order
reversals. Especially at boot and shutdown.

Attached is a screenshot of one, it looks like it has to do with the storage
subsystem. Doesn't halt execution, and I haven't seen any corruption. It also
does not appear that these reversals become more frequent when disk I/O
increases.

Is this an indication of something wrong, or just a debugging notice I should
ignore or disable?

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