Re: [FYI] GCC segfaults under heavy multithreaded compilation with AMD Ryzen

[Borislav Petkov <bp@alien8.de>]

On Wed, Jul 26, 2017 at 06:54:01AM +0900, Satoru Takeuchi wrote:
> # I'm a LKML subscriber, but not a x86 list subscriber
> 
> I found the following new linux kernel bugzilla about Ryzen related problem.
> Since many developers don't check this bugzilla and I've also
> encountered this problem,
> I decided to introduce this problem here.
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=196481:
> > I am running Ubuntu and installed the mainline kernel from the mainline PPA.
> > It seems like the Ryzen processor has some bug that leads to gcc crashing
> > when compiling a very large program under heavy load. This is easily reproduced
> > in my system using the script from
> >
> > https://github.com/suaefar/ryzen-test
> >
> > (It assumes that you are running Ubuntu, maybe Debian also works. Just clone it and run the > script kill_ryzen.sh. It downloads the gcc 7.1 code and start multiple compilations of it. If any
> > compilations fails its warns the user giving the time to detect failure).
> >
> > There is already a bug report about this in the FreeBSD bugzilla
> > (https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219399#c89).
> > There is also a thread on the subject in AMD community forum
> > (https://community.amd.com/thread/215773?start=300&tstart=0)
> > and Phoronix (https://www.phoronix.com/forums/forum/hardware/processors-memory/955368-some-ryzen-linux-users-are-facing-issues-with-heavy-compilation-loads).

Apparently, you can RMA your CPU:

https://www.phoronix.com/scan.php?page=news_item&px=Ryzen-Segv-Response

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--