[Bug 263445] [tcp] Fatal trap 12: page fault while in kernel mode // supervisor read data, page not present // 13.1-RC3

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263445

--- Comment #14 from Igor A. Valkov <viaprog@gmail.com> ---
(In reply to Michael Tuexen from comment #13)

> How long does a server need to run until it crashes?
Sometimes several hours but sometimes several days.
Here are the timings of the incidents:

May 11 21:00
May 13 15:02
May 14 08:05
May 15 15:10
May 15 16:51
May 19 10:31 vmcore.1
May 20 01:04 vmcore.2
May 20 15:20 vmcore.3
May 30 20:17 vmcore.4
May 30 23:12 vmcore.5


> Are the servers running at high load?
Yes. Web serving on 10Gb channel (Intel X550T) with nginx. 64 cores of opteron
6380.

> Regarding "custom build kernel": We were wondering if you can compile a kernel with specific options turned on (like INVARIANTS and other things) and potentially have some modifications to the source code? This intention is to get more information about what is going on...

Yes. I can.

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