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From: Andreas Schwarz <freebsd.asc@strcmp.org>
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On 26.03.15, Ian Lepore wrote:

> With commit r280712, we now have a new alternate implementation of the
> arm pmap code available (the low-level part of virtual memory handling).
> Right now it's disabled by default; if you'd like to help test it, add
> to your kernel config:
>
>   options ARM_NEW_PMAP

I just want to give some feedback. I'm using the ARM_NEW_PMAP on my 
both RPi B+ without any problems (r280787). One of them is under heavy 
load with buildworld, etc., the other one is used as a mini NAS, no probs 
so far.

-asc