From owner-freebsd-stable@freebsd.org  Thu Oct 18 17:14:19 2018
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To: FreeBSD stable <freebsd-stable@freebsd.org>
From: Eugene Grosbein <eugen@grosbein.net>
Subject: krpc: unbootable ZFS-on-root after major upgrade to 11.2
Cc: FreeBSD Release Engineering Team <re@freebsd.org>
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Date: Fri, 19 Oct 2018 00:14:04 +0700
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Hi!

It was brought to my attention that 10.x did not require availability
of krpc for ZFS-on-root system to be bootable but 11.x does.

That is, major upgrade of 10.x ZFS-on-root system to 11.x
results in non-bootable broken system if it uses custom kernel without NFS bits
that automatically come with krpc, and the system was built with MODULES_OVERRIDE="zfs opensolaris"
and no krpc mentioned.

We could have mentioned that requrement in Release Notes but we had not.

Should we issue an Errata Note?