This commit  lowers 0 A.D. performance from ~28 fps to ~20 fps, confirmed with LIBGL_SHOW_FPS=1 mesa variable and with in game FPS counter. This is on 0ad alpha 8 on default Oasis map. Tested with current mesa git up to e60daf7 with and without the  commit reverted.
The card is:
r300: DRM version: 2.9.0, Name: ATI RV530, ID: 0x71c5, GB: 1, Z: 2
r300: GART size: 509 MB, VRAM size: 256 MB
r300: AA compression RAM: YES, Z compression RAM: YES, HiZ RAM: YES
Author: Marek Olšák <email@example.com>
Date: Sat Dec 24 08:15:40 2011 +0100
winsys/radeon: move managing GEM domains back to drivers
This partially reverts commit 363ff844753c46ac9c13866627e096b091ea81f8.
It caused severe performance drops in Nexuiz. Reported by Phoronix.
Tested by me on r300g and by IRC people on r600g.
If I revert that commit, Nexuiz will be slow again. I can't do that.
That's fair. But would be eventually possible to improve it to get max performance on both games?
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