On 11/28/2012 09:09 PM, Jerome Glisse wrote:
On Wed, Nov 28, 2012 at 10:05 AM, <j.glisse@xxxxxxxxx> wrote:
From: Jerome Glisse <jglisse@xxxxxxxxxx>
It make no sense to preserve caching state especialy when
moving from vram to system. It burden the page allocator to
match the vram caching (often WC) which just burn CPU cycle
for no good reasons.
Nack.
This is a driver problem.
What happens with this patch if you evict write-combined TT memory to
system?
That's why we want to preserve caching state in the first place.
If you need a different behavior, you can fine-tune in
driver::evict_flags, or in the
radeon-case in radeon_move_ram_vram / radeon_move_vram_ram.
/Thomas
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