From owner-freebsd-fs@freebsd.org  Sat Mar 19 02:01:12 2016
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Subject: Head's up - yet another deadlock in ZFS
From: "K. Macy" <kmacy@freebsd.org>
To: "freebsd-fs@FreeBSD.org" <freebsd-fs@freebsd.org>
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My driver test system will currently not mountroot with a non-debug
HEAD. Looking at ps one of the ZFS threads is blocking on the spa
lock, but I can't tell which one it is without WITNESS.

-M