Phoronix: A GEM-ified TTM Manager For Radeon

Back in May when X.Org developers were voicing concerns about Tungsten's TTM as being the kernel memory manager used for graphics drivers, Keith Packard had unveiled the work Intel had been doing for an alternate kernel memory manager. This memory manager they call GEM, or the Graphics Execution Manager, is a competing solution but it has some advantages such as being simpler to develop drivers around (A Technical Explanation of Intel's GEM)...

http://www.phoronix.com/vr.php?view=NjY3Ng