Ryzen issues on FreeBSD ? (with sort of workaround)

[Pete French]

> I highly doubt that this can be related.

Well, yes, it suroprised me too :-) Admittedly I dont have a very big 
samle set - I nly have one Ryzen box and a pair of Epyc boxes in Azure. 
but I cant make it run on any of them. I take the same OS and run it on 
Intel and its fine (literally I am cross-mounting /usr/sr and /usr/obj 
and doing an installworld on the Intel machine - its the same build).

Will try and get this onto a USB key and test further though, so that
I know the enivironment is the same.

> BTW, I forgot about the patch.  If nothing happens, I will commit it
> today.

Ah, thankyou, that would be great.

-pete.