Phoronix published a review on the AMD Confirms Linux Performance Marginality Problem Affecting Some, Doesn't Affect Epyc / TR
A quote from the article:
This morning I was on a call with AMD and they are now able to confirm they have reproduced the Ryzen "segmentation fault issue" and are working with affected customers.AMD Confirms Linux Performance Marginality Problem Affecting Some, Doesn't Affect Epyc / TR @ Phoronix