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

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Sat Aug 5 19:48:03 UTC 2017


--- Comment #54 from Nils Beyer <nbe at renzel.net> ---
(In reply to Don Lewis from comment #53)

> Interestingly both node and libreoffice core files indicate that c++ died at the same place.

that sounds strange - the main feature of these failures is arbitrariness, and
now you have some kind of equal repetition.

Do you have any possibility to generate that again - probably with a
self-written program?

I cannot test this at moment as both my Ryzen boxes are frozen dead - and they
are at my work-place where I'll be not until Monday.

The reason I ask is because the Linux users got some momentum due to two
Phoronix articles about these segfaults:


Unfortunately, the author relied on segfaults with "conftest" stuff which was
not a very wise choice to prove that there is something wrong. "conftest" is
meant to segfault, isn't it?

So, if we can provide something that reliably segfaults on an AMD but not on an
Intel that would be something. Would be a pity if AMD finally says: "see, there
is no problem with the Ryzen; you just have done it wrongly all the time"...

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