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Date: Fri, 19 Jan 2018 14:32:29 -0800 (PST)
From: Don Lewis <truckman@FreeBSD.org>
Subject: Re: Ryzen issues on FreeBSD ?
To: Mike Tancsa <mike@sentex.net>
cc: Peter Moody <freebsd@hda3.com>, Nimrod Levy <nimrodl@gmail.com>,
 freebsd-stable@freebsd.org, Pete French <petefrench@ingresso.co.uk>
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On 19 Jan, Mike Tancsa wrote:
> On 1/19/2018 3:32 PM, Peter Moody wrote:
>> 
>> I have a ryzen5 1600X and an ASRock AB350M and I've tried just about
>> everything in all of these threads; disabling C state (no effect),
>> setting the sysctl (doesn't exist on my 11.1 RELEASE), tweaking
>> voltage and cooling settings, rma'ing the board the cpu and the
>> memory. nothing helped.
>> 
>> last night I tried disabling SMT and, so far so good.
> 
> 
> Is there anything that can be done to trigger the lockup more reliably ?
> I havent found any patterns. I have had lockups with the system is 100%
> idle and lockups when lightly loaded.  I have yet to see any segfaults
> or sig 11s while doing buildworld (make -j12 or make -j16 even)

I never seen the idle lockup problem here.  Prior to the shared page
fix, I could almost always trigger a system hang or silent reboot by
doing a parallel build of openjdk8.