Hi,
So attached is last batch of patch, i split the ttm put page fix and i fixed a bug in the pages alloc when clear flags wasn't set. I tested them on a bunch of radeon and everythings seems fine (several gl app, firefox, compositor ...). I will do more testing on agp and nouveau tomorrow.
The last patch add callback for populating and unpopulating (better name if any welcome) a ttm_tt. Allowing the driver to choose btw different choice, idea is that Konrad dma allocator would provide helper function the driver can call.
I choosed to allocate all page at once because ttm_tt object are meant to be bind and thus to be fully populated in their lifetime (vmwgfx might be different in this regard). It simplify code in several place. I didn't see any performances impact in the few gl benchmark i ran.
Konrad so i am planning on rebasing the last 4 patch of your patchset on top of that. They will likely shrink in size a bit.
Cheers, Jerome Glisse