Jaegeuk Kim sent out the pull request this week for updating the Flash-Friendly File-System for Linux 4.6. His pull request needs to be re-submitted to a mistake he made that upset Torvalds, but it gives us a look at the features that are coming for this file-system in the next Linux kernel release.
Some of the highlights include changing around the file-system encryption code, giving sysfs entries to control memory consumption, AIO performance enhancements, enhanced foreground garbage collection, faster SEEK_DATA and filemap support, and a number of bug fixes.
I'll have some fresh Linux file-system benchmarks (e.g. Btrfs vs. XFS vs. EXT4 vs. F2FS) once the 4.6 merge window is over.