Torvalds wrote in his brief 3.9-rc4 release announcement:
Another week, another -rc. And things haven't calmed down, meaning that the nice small and calm -rc2 was definitely the outlier so far. But I'm optimistic, dammit, and I'm going to keep hoping that things will change, and the upcoming week will be boring and devoid of any real work what-so-ever.At least there's many interesting features to Linux 3.9.
It had better be, because it's spring break and the kids are around.
While it hasn't been as calm as I'd like things to be, it's not like things have been hugely exciting either. Most of this really is pretty trivial. It's all over, with the bulk in drivers (drm, md, net, mtd, usb, sound), but also some arch updates (powerpc, arm, sparc, x86) and filesystem work (cifs, ext4).