The Extra DMA-BUF PRIME Patches For Linux 3.5
Written by Michael Larabel in Linux Kernel on 31 May 2012 at 11:29 AM EDT. 1 Comment
Another DRM pull request for the Linux 3.5 kernel has been issued. This extra pull provides the DRM DMA-BUF PRIME mmap/vmap support.

Building upon the massive DRM GPU driver changes in Linux 3.5 and the DMA-BUF 3.5 pull, there's now the pull from David Airlie that ties in the DRM driver changes to what landed in the DMA-BUF pull. In particular, the DRM drivers have been hooked into the PRIME MMAP/VMAP handling support. The groundwork for DMA-BUF PRIME was laid in Linux 3.4.

There's VMAP export support for the Intel, Radeon, and Nouveau drivers and then VMAP import support for UDL, the DisplayLink DRM driver. This will ultimately allow for some interesting possibilities with the Linux multi-seat computers, etc. But if you're hoping this buffer sharing work in the Linux 3.5 kernel will suddenly allow for proper NVIDIA Optimus, NVIDIA SLI, and AMD CrossFire, we're not there yet.

This "drm prime mmap/vmap" pull can be found at

About The Author
Author picture

Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter or contacted via

Related Linux Kernel News
Popular News
Trending Reviews & Featured Articles