With the merge window being shut, there aren't any new features to this second release candidate, but just bug and regression fixes. If you're not familiar what's already been committed to Linux 3.1, see our announcement last week that provides some of the highlights.
As LKML is down at the moment, below is the 3.1-rc2 release announcement from Linus.
Hey, nice calm first week after the merge window. Good job. Or maybe people are just being lazy, and everybody is on vacation. Whatever. Don't tell me. I'm reasonably happy, I want to stay that way.
That said, I would be happy if it calmed down further. 300+ commits for -rc2 is good, but please make me even happier for -rc3 by ONLY sending me real fixes. Think of it as "fairly late in the -rc series", because I really want to compensate for the merge window being fairly chaotic.