From owner-freebsd-stable@freebsd.org  Sun Jul 29 12:29:36 2018
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Subject: Re: Ryzen issues on FreeBSD ?
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From: Lukasz <FreeBSD@chroot.pl>
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Date: Sun, 29 Jul 2018 14:29:23 +0200
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I had the same issues - hard lockups after couple hours of work
(different loads).

My platform is:
OS: 11.1 and 11.2 (amd64)
CPU: AMD Ryzen 5 1400 Quad-Core
Motherboard: AX370-Gaming K5
ZFS pool: 10TB
BIOS: default settings (HT on)

After only upgrade to the newest BIOS everyhting works as expected - no
lockups at all. Now the machine has 47 hours uptime with zfs snapshot
received and  zfs scrub completed.

Regards,
Lukasz