From owner-freebsd-arm@FreeBSD.ORG  Fri Apr 10 12:37:14 2015
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Subject: Re: panic: pmap_demote_section: No l2_bucket for wired mapping
From: Paul Mather <paul@gromit.dlib.vt.edu>
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To: Milan Obuch <freebsd-arm@dino.sk>
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On Apr 10, 2015, at 5:16 AM, Milan Obuch <freebsd-arm@dino.sk> wrote:

> On Fri, 10 Apr 2015 14:39:05 +0530
> Pratik Singhal <ps06756@gmail.com> wrote:
> 
>> I am also able to reproduce the same bug on my Cubieboard 1 with
>> freeBSD 11-current :-
>> 
>> I am pasting the stack trace and the boot log.
>> 
>> boot log :- http://pastie.org/10084212
>> 
>> stack trace :- http://pastie.org/10084214
>> 
> 
> Hi,
> 
> could you try adding 'options ARM_NEW_PMAP' to your kernel configs? It
> looks like it fixes this issue for me. If yoo can verify it, then I
> suggest to add this into RPI-B kernel config in our source tree for
> everybody, and some other kernel configs as well.


Just as an update, the ARM_NEW_PMAP code fixes the "No l2_bucket for 
wired mapping" panic I was getting on BeagleBone Black.

Cheers,

Paul.