Linus Torvalds wrote in releasing the fourth release candidate for the Linux 3.11 kernel:
I had hoped things would start calming down, but rc4 is pretty much exactly the same size as rc3 was. That said, the patches seem a bit more spread out, and less interesting - which is a good thing. Boring is good. Let's keep it that way, and try to make for fewer patches for -rc5, ok? Because we are past half-way now, and I really want to see just fixes.
We've got some arch updates (arm, parisc), but most of this is drivers (mostly networking, usb and some drm updates). There's also some core networking changes. And the printk code movement looks big if you don't do git renames (ie like the patches I upload).
For those not familiar with the changes found in Linux 3.11, there's many new and exciting features.