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> References: <5092667B.2030908@thieprojects.ch>
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On Nov 1, 2012, at 5:09 AM, Werner Thie wrote: > Hi all >=20 > 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! >=20 > When experimentally adding a swap file I encountered the following = message repeatedly on console: >=20 > dd if=3D/dev/zero of=3D/usr/swap0 bs=3D1024k count=3D512 >=20 > 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
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