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Date:      Tue, 30 May 2017 08:58:52 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 219399] System panics after several hours of 14-threads-compilation orgies using poudriere on AMD Ryzen...
Message-ID:  <bug-219399-8-746sY1UjJK@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-219399-8@https.bugs.freebsd.org/bugzilla/>
References:  <bug-219399-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D219399

--- Comment #9 from Andriy Gapon <avg@FreeBSD.org> ---
Nils,

I am not aware of any "mini test" that would be as good as a poudriere buil=
d or
a highly parallel buildworld.

I am not sure that the nvidia is really a culprit here, the stack frames be=
yond
the trap frame look rather messed up.  Maybe it's not that surprising given
that the original trap type is 0xc, #SS, Stack-Segment Fault.  Perhaps there
was a stack overflow.

If in kgdb you do 'list *0xffffffff831e410b', does it also point to _nv0002=
24rm
?

The inability of kgdb to deal with the memory dump suggests a possibility of
critical page table structures being corrupt or a significant binary mismat=
ch
between the userland (libkvm, etc) and the kernel.

FWIW, I found a bug report with somewhat similar backtrace, but it does not
have any enlightening details: bug #193622.

Perhaps a mismatch between the module and the kernel...

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