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So, why hasn't that wonderful memory manager been used in the OSS radeon driver, instead of TTM ?
Well, they didn't at any point say they want to opensource fglrx, did they? Besides, who are they to deny radeon developers the pleasure of yanking their hair out in frustration while trying to figure out how a memory manager should work.
The closed source memory manager is designed around a completely different driver stack, all parts of the stack (2D, 3D, etc.) have have to be substantially rewritten to use it.
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