Date: Thu, 1 Nov 2012 20:24:04 -0700 From: Tim Kientzle <tim@kientzle.com> To: Werner Thie <werner@thieprojects.ch> Cc: freebsd-arm@freebsd.org Subject: Re: BeagleBone SD card problems Message-ID: <5C5E2EAA-DEE7-4F79-9F23-A614DE32EBF9@kientzle.com> In-Reply-To: <5092667B.2030908@thieprojects.ch>
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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. Timhome | help
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