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

[bugzilla-noreply at freebsd.org]

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

            Bug ID: 221029
           Summary: AMD Ryzen: strange compilation failures using
                    poudriere or plain buildkernel/buildworld
           Product: Base System
           Version: 11.0-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: nbe at renzel.net

Hi,

with reference to:

    https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219399

on an AMD Ryzen system there are strange compilation errors consisting of

    - bus errors
    - segmentation faults
    - unable to rename temporary 'XXX' to 'YYY' using TMPFS

running poudriere bulk builds or plain buildkernel/buildworld

These compilations will succeed with a high probability if you start them
again.

The root cause to that is still unknown. Related threads in AMD's forum and
elsewhere can be found here:

    https://community.amd.com/thread/215773
   
https://www.phoronix.com/forums/forum/hardware/processors-memory/955368-some-ryzen-linux-users-are-facing-issues-with-heavy-compilation-loads
    https://forums.gentoo.org/viewtopic-t-1061546.html

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