[Bug 221029] AMD Ryzen: strange compilation failures using poudriere or plain buildkernel/buildworld

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221029

--- Comment #51 from Don Lewis <truckman at FreeBSD.org> ---
(In reply to Conrad Meyer from comment #46)
r321919 looks very promising.  I upgraded to r322026 and the only "unexpected"
failure during my poudriere run was the lang/ghc sigbus failure, which has
always failed for me on Ryzen.  It doesn't fix the hang/crash problem caused by
executing  code just under the top of user memory.

I'll re-enable SMT for my next poudriere run to see if my luck holds.

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