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Date:      Thu, 21 Aug 2014 01:00:57 -0700
From:      Peter Wemm <peter@wemm.org>
To:        freebsd-current@freebsd.org
Subject:   Beware, ZFS on head!
Message-ID:  <1941128.cnvqpMJCeM@overcee.wemm.org>

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Depending on how you build it, you may either get a kernel compile fail=
ure (if=20
you build zfs into the core kernel with "options ZFS"), or possibly eve=
n an=20
invalid zfs.ko with an undefined symbol that can't be used at reboot ti=
me.  Be=20
exceptionally careful.

I suggest, before rebooting, do a=20
# nm /boot/kernel/zfs.ko | grep atomic_dec

If you see:
  U atomic_dec_64_nv
.. you will have a sub-optimal reboot experience and you may want to sa=
ve your=20
kernel.old.

(no output =3D> you're fine =3D> carry on!)

=2D-=20
Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com; KI=
6FJV
UTF-8: for when a ' or ... just won\342\200\231t do\342\200\246
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