Kernel release status
the O_TMPFILE flag that is new to 3.11 has been going through a few ABI/API cleanups (and a few fixes to the implementation too), but I think we're done now. So if you're interested in the concept of unnamed temporary files, go ahead and test it out. The lack of name not only gets rid of races/complications with filename generation, it can make the whole thing more efficient since you don't have the directory operations that can cause serializing IO etc."
Stable updates: 3.10.2, 3.9.11, 3.4.54, and 3.0.87 were released on July 21; 3.9.11 is the last of the 3.9 series.
As of this writing, 3.10.3 and 3.2.49 are in the review process; they can be
expected sometime on or after July 25.