Phoronix: A Technical Explanation Of Intel's GEM

Back in May while open-source X developers were bickering about their TTM memory manager concerns, Intel's Keith Packard chimed in and announced Intel's Graphics Execution Manager, or GEM for short. The Graphics Execution Manager is Intel's replacement of Tungsten's TTM for their xf86-video-intel graphics driver...

http://www.phoronix.com/vr.php?view=NjU3MA