From owner-freebsd-current@freebsd.org  Sat Nov 26 09:21:33 2016
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Date: Sat, 26 Nov 2016 12:21:24 +0300
From: Slawa Olhovchenkov <slw@zxy.spb.ru>
To: current@freebsd.org
Subject: Enabling NUMA in BIOS stop booting FreeBSD
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I am try to enable NUMA in bios and can't boot FreeBSD.
Boot stoped after next messages:

===
Booting...
KDB: debugger backends: ddb
KDB: current backend: ddb
===

This is verbose boot.
No reaction to ~^B, NMI.

Same for head and 10.3-RELEASE.

Hardware is Supermicro X10DRi, Dual E5-2650v4, 256GB RAM.

On slight different hardware
(Supermicro X10DRi w/ old BIOS, Dual E5-2640v3, 128GB RAM)
10.3 boot ok w/ BIOS NUMA enabled.