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Subject: [Bug 185427] [igb] [panic] freebsd 8.4, 9.1 and 9.2 panic
 Double-Fault with intel 82576 igb driver
Date: Mon, 11 Jan 2016 08:22:51 +0000
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X-Bugzilla-Keywords: IntelNetworking, crash
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X-Bugzilla-Who: eugen@grosbein.net
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D185427

--- Comment #9 from eugen@grosbein.net ---
(In reply to napTu from comment #8)

There seem to be some problems with multithreading and/or locks within 9.x
kernel/ng_nat code. 82576 just adds extra parallelism as it supports MSI-X =
and
multiple receive interrupts and increase probability of races within NETGRA=
PH
code. 82571 supports only single-threaded receive path.

Why do you use ng_nat if you do not run mpd?

Try to switch from ng_nat to ipfw nat and eliminate netgraph to simplify co=
de
path.

Your 8.x crash link is broken (404).

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