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Date:      Sat, 04 Mar 2017 22:34:39 -0800
From:      "Chris H" <bsd-lists@bsdforge.com>
To:        freebsd-current@freebsd.org, Alastair Hogge <agh@fastmail.fm>
Subject:   Re: kernel trap 12 with interrupts disabled
Message-ID:  <7c300bdfa4f923ec5406e257dbb17ad1@ultimatedns.net>
In-Reply-To: <3109513.uzeZf1mvEc@madcat.anarchadelic.>
References:  <959436378530ea6a182825fb1328bcb6@ultimatedns.net> <3244339.Sh8jFgR0Eq@madcat.anarchadelic.> <2e2714cc5f991d19c70ccff599aa3fe6@ultimatedns.net>, <3109513.uzeZf1mvEc@madcat.anarchadelic.>

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On Sun, 05 Mar 2017 14:26:31 +0800 Alastair Hogge <agh@fastmail.fm> wrote

> On Sat, 4 Mar 2017 10:08:45 PM Chris H wrote:
> > Thanks for the reply.
> > I rebooted to kernel.old, so I could get the exact
> > src revision I built this on. It's r314640
> > 
> > Any news as to whether it's safe to update src, and
> > build a usable kernel?
> 
> I am not able to boot a kernel > r314627.  I currently have a r314627 kernel 
> running with a r314687 world.

Looking at the output in my trap; I got the impression that
the commit: r314636, might be to blame --

MCA: add AMD Error Thresholding support

Currently the feature is implemented only for a subset of errors
reported via Bank 4.  The subset includes only DRAM-related errors.

The new code builds upon and reuses the Intel CMC (Correctable MCE
Counters) support code.  However, the AMD feature is quite different
and, unfortunately, much less regular.

Just a guess, tho.

I'm thinking to back that commit out, and giving world/kernel
another shot.

--Chris

> 
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