Ryzen public erratas

[Eric van Gyzen]

On 06/13/2018 05:35, Konstantin Belousov wrote:
> Today I noted that AMD published the public errata document for Ryzens,
> https://developer.amd.com/wp-content/resources/55449_1.12.pdf
> 
> Some of the issues listed there looks quite relevant to the potential
> hangs that some people still experience with the machines.  I wrote
> a script which should apply the recommended workarounds to the erratas
> that I find interesting.
> 
> To run it, kldload cpuctl, then apply the latest firmware update to your
> CPU, then run the following shell script.  Comments indicate the errata
> number for the workarounds.
> 
> Please report the results.  If the script helps, I will code the kernel
> change to apply the workarounds.
Kostik:  This thread on the -stable list has a lot of positive feedback:

https://lists.freebsd.org/pipermail/freebsd-stable/2018-June/089110.html

Eric