Current status of Ryzen (non-)support

[Greg V]

On Sun, Oct 21, 2018 at 7:09 PM, Hannes Hauswedell 
<h2+lists2018 at fsfe.org> wrote:
> Hi everyone,
> 
> I wanted to ask what the current status of Ryzen support is and/or
> whether any new changes are planned.
> 
> My situation:
> * second generation Ryzen: 2600X
> * running -CURRENT
> * I have done the things described here:
> https://lists.freebsd.org/pipermail/freebsd-current/2018-June/069799.html
> * no full system freezes, but under load, e.g. building with 12 
> threads,
> programs start to segfault.
> * memtest86 ran through without issues
> * on a Linux dual boot I haven't had any issues
> 
> Is this a known problem? Anythings I can do about it? I thought the
> Ryzen problem were only supposed to happen with first generation 
> CPUs...

First gen (R7 1700) here, overclocked to 3.9GHz, also running CURRENT 
— never had any unexpected segfaults, even when building with 16 
threads.

The only bug is that the bottom (chipset) PCIe slot breaks when an NVMe 
SSD is installed / chipset USB3 ports don't work:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=231923