Linux 4.9 [https://lkml.org/lkml/2016/12/11/102 has been released] on Sun, 11 Dec 2016.
Warning: The changelog is not complete. It will be finished in the future. . Meanwhile, you can examine read about Linux 4.9 here:
- LWN's 4.9 Merge window, [ part 1], [ part 2], [ part 3]
Phoronix.com [http://www.phoronix.com/scan.php?page=article&item=linux-49-features&num=1 The Exciting Features Of The Linux 4.9 Kernel] or [http://www.phoronix.com/scan.php?page=news_item&px=Linux-4.9-Kernel-Highlights The Best Features Of The Linux 4.9 Kernel]
heise.de [https://www.heise.de/ct/artikel/Die-Neuerungen-von-Linux-4-9-3351436.html Die Neuerungen von Linux 4.9]
You can also examine the merge list: