https://bugs.freedesktop.org/show_bug.cgi?id=62959
--- Comment #42 from Alexandre Demers alexandre.f.demers@gmail.com --- (In reply to comment #40)
in /etc/environment I have R600_DEBUG=nodma ever since discovering that setting, i.e.: also now the R6))_DEBUG is set to nodma.
I did not apply any of your patches over the 3.9.0-rc7 kernel.
Your log looks to the one in bug 58354, which is also related to DMA, or bug 59089, which is related to htile/VM.
The best thing would be to bisect the kernel between a good known version and the first bad one. Do you have a previous kernel version that was working OK as a good reference?