Phoronix: OverlayFS File-System Proposed For Linux 3.10 Kernel

The Overlay File-System has been in development for several years and is used by some notable Linux distributions, but has yet to be merged into the mainline Linux kernel after having to be pulled a few times in the past. The new plan is to merge OverlayFS for the Linux 3.10 kernel...

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