Linus Torvalds announced a few minutes ago, September 16, that the first Release Candidate version of the upcoming Linux 3.12 kernel is now available for download and testing.
Linux kernel 3.12 RC1 is a normal release and it comprises about 73% drivers, 12% architecture updates, and 6% file system improvements.
"I personally particularly like the scalability improvements that got merged this time around. The tty layer locking got cleaned up and in the process a lot of locking became per-tty, which actually shows up on some (admittedly odd) loads."
"And the dentry refcount scalability work means that the filename caches now scale very well indeed, even for the case where you look up the same directory or file (which could historically result in contention on the per-dentry d_lock)," said Linus Torvalds in the official release announcement.
Download Linux kernel 3.12 RC1 right now from Softpedia. Remember that this is a development version and it should NOT be installed on production machines. It is intended for testing purposes only.