Comment # 5 on bug 104608 from Vedran Miletić

4.15-rc8 on Kaveri after modprobe -r:

[  215.855452] [drm] radeon: finishing device.
[  215.895091] [TTM] Finalizing pool allocator
[  215.895254] [TTM] Finalizing DMA pool allocator
[  215.895302] [TTM] Zone  kernel: Used memory at exit: 2080 kiB
[  215.895305] [drm] radeon: ttm finalized

I'll close this bug after I get a chance to try it on RV635. Thanks!