After almost 69 continues days of development, Linus Trovalds announced the release of the new version of Linux Kernel. This version 2.6.38 came with several new features. "The most impacting feature in this release is the so-called "the patch that does wonders", a patch that changes substantility how the process schedular assigns shares of CPU time to each process." 

Besides this, there is also significant scalability improvements improvements in the VFS, Btrfs LZO compression and read-only snapshots , support for the B.A.T.M.A.N.

To check the rest of new featurs please see this.