BeagleBone SD card problems

[Tim Kientzle]

On Nov 1, 2012, at 5:09 AM, Werner Thie wrote:

> Hi all
> 
> just got my fingers wet with a Rev A6 Beaglebone. Being a long time user of FreeBSD I found of course Tim Kientzle's project on github. Setting up a VM and the building of an image was a nobrainer, mahalo and kudos to Tim!
> 
> When experimentally adding a swap file I encountered the following message repeatedly on console:
> 
> dd if=/dev/zero of=/usr/swap0 bs=1024k count=512
> 
> ti_mmchs0: Error: current cmd NULL, already done?

Don't know for sure that it is a problem, actually.

I think of this message more as a gentle reminder:
Someone needs to study the driver and go through the
hardware docs carefully to figure out whether
this particular case indicates a flaw in the driver or
is just an expected case that can be safely ignored.

While you're in there <grin>, you might look at
what's involved in converting the driver to use DMA
and whether there are any other performance optimizations
we should be trying.

Tim