Aside from the fix for HIGHMEM64G users, the Linux 2.6.26-rc4 kernel has many driver updates along with CIFS/NFS/arch changes. This release does revert the DRM / vBlank work due to some unexpected fallout.
Michael Larabel is the principal author of Phoronix.com 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 OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.