[Bug 78221] 3.16 RC1: AMD R9 270 GPU locks up on some heavy 2D activity - GPU VM fault occurs. (possibly DMA copying issue strikes back?)

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=78221

--- Comment #3 from t3st3r at mail.ru ---
Not looks like this. Re-checked again, using very same version of drivers in
process. I'm unable to trigged bug with 3.15 mainline kernel, no matter what.
But it happens easily with older kernels like 3.14 or early 3.15RCs, and would
also happen with 3.16-RC1. This makes me to think it comes to DMA issues. What
makes me even more suspicious about it is that early 3.15RC were crashing as
well, but in release version its gone. Looks like last-minute changes related
to DMA have fixed this instability. But now it re-appeared again :(.

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