[Bug 219399] System panics after several hours of 14-threads-compilation orgies using poudriere on AMD Ryzen...

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

--- Comment #258 from Don Lewis <truckman at FreeBSD.org> ---
(In reply to Mark Millard from comment #255)
I never got panics.  Instead, my machine would either blank the video (text
console, not running Xorg) and hang, or would silently reboot.  Building
openjdk7 was a fairly reliable trigger.  Moving the shared page was a 100% fix
for that problem.

I still don't fully understand the problem.  The signal trampoline location
should have been far enough away from the boundary for the instruction
prefetcher to stop before hitting the boundary ...

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