freebsd stable - Apr 2018 - Ryzen issues on FreeBSD ? (with sort of workaround)

On 02/12/2018 21:54, Peter Moody wrote:
>> I'm having really good luck with the kernel patch attached to this
>> message:
>>
https://docs.freebsd.org/cgi/getmsg.cgi?fetch=417183+0+archive/2018/freebsd-hackers/20180211.freebsd-hackers
> 
> I'm new to this; what are the chances that this gets into -STABLE in
> the near future?
Pretty high, I imagine.  Add yourself to these to stay informed:

	https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225584

	https://reviews.freebsd.org/D14347

Eric

So, resurrecting the thread from a few weeks ago, as I finally found
time yesterday to out together the Ryzen machine I bought the parts for in
Jaunary (busy year at work....). All went smoothl;y, checked it
booted up, used it for 15 minutes, was impressed by the speed and went home.

...and by the time I got home, an hour or so later, it had locked up hard.

I was somewhat dissapointed, as I had seen various fixes go in,. and had hoped
the issues were fixed. This morning I have booted the machine back up,
tweaking the BIOPS to do things mentioned in this thread, viz:

	Disable Turbo Boost
	Disable SMT
	Disable global C-states

The memory was already ruunning correctly at 2133 (though I have locked that
in the BIOS too) and I was already using kern.eventtimer.periodic=1, so
the lockup was not related to those. Its the latest BIOS, and a -STABLE
build from yesterday.

I suspect it will now be stable, but I was wondering if anyone was any further
forward on working out which of the settings above are the ones which
'fix'
the issue - or indeed if its really fixed, by them or just made far less likely
to happen.

Anyone got any more comments on this ?

cheers,

-pete.