I've got the same issue with the error messages. Intel Core i5 6500 on Asrock Z170 Pro4s.
I see the messages on boot and then in the unraid web interface Logs section.
My major issue is that it fills my logs memory to 100% in 2-3 min form boot-up.
More worrying is that cpu core 0 is ALWAYS at 100% load. This means slower performace and higher power consumption, because 1 core is at 100% the CPU never goes in powersaving mode.
Does anyone have any idea about how to solve this problem?
My MB is on the latest BIOS update. Is this an unraid-Skylake issue, unraid-Z170 issue or an unraid-asrock one (are there similar issues with skylake cpus on other motherboard brands)?