From owner-freebsd-stable@freebsd.org  Wed Feb 22 20:47:57 2017
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Date: Wed, 22 Feb 2017 23:47:42 +0300
From: Lev Serebryakov <lev@FreeBSD.org>
Reply-To: Lev Serebryakov <lev@FreeBSD.org>
Organization: FreeBSD
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Message-ID: <492944119.20170222234742@serebryakov.spb.ru>
To: freebsd-stable@freebsd.org, freebsd-fs@freebsd.org
Subject: Is it known problem,
 that zfs.ko could not be built with system compiler (clang 
 3.9.1) without optimization?
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Hello Freebsd-stable,

   Now if you build zfs.ko with -O0 it panics on boot.

   If you use default optimization level, a lot of fbt DTreace probes are
  missing.

-- 
Best regards,
 Lev                          mailto:lev@FreeBSD.org