new support for Raspberry Pi B+

[Warner Losh]

On Nov 22, 2014, at 2:05 PM, Ian Lepore <ian at FreeBSD.org> wrote:

> On Sat, 2014-11-22 at 13:56 -0700, Dan Raymond wrote:
>> On 11/22/2014 1:09 PM, Bernd Walter wrote:
>>> On Sat, Nov 22, 2014 at 12:46:34PM -0700, Dan Raymond wrote:
>>>> Further testing with the 16GB Kingston reveals that it is unstable even
>>>> at low speed.  I hit the following panic while executing "portsnap fetch
>>>> update" on a r274416 build:
>>>> 
>>>> dev = mmcsd0s2a, ino = 155101, fs = /mnt/ufs
>>>> panic: ffs_freefile: freeing free inode
>>>> KDB: enter: panic
>>>> [ thread pid 8 tid 100056 ]
>>>> Stopped at      $d:     ldrb    r15, [r15, r15, ror r15]!
>>>> db>
>>> Maybe you've received a counterfeit.
>>> Unfortunately there are a lot of them on the market.
>>> Some of them are technically smaller than they claim and overwrite
>>> other data if they run short.
>> 
>> I considered that originally which is why I bought 4 different cards of 
>> different brands for testing (Transcend, SanDisk, Samsung, Kingston):
>> 
>> http://www.amazon.com/gp/product/B00CBD0XSI/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1
>> http://www.amazon.com/gp/product/B00M55C0NS/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1
>> http://www.amazon.com/gp/product/B00IVPU7DQ/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1
>> http://www.amazon.com/gp/product/B003WIRFD2/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
>> 
>> None of them will boot FreeBSD at high speed and I have seen SD related 
>> panics with 3 of them (so far) at low speed.
> 
> I would actually dispute that this one is an sd-related panic, unless
> you have messages about gvfs_iodone failures on the console before the
> panic.  Otherwise this is more likely another memory corruption problem
> similar to the panics being reported on wandboard.

The RPi is also sensitive to power. I’ve seen weird corruption like this when I tried to run
my RPi off a battery and the battery was getting weak...

Warner
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