The second 3.18 prepatch is available for testing. “I had hoped that the rc1 release would mean that a few stragglers would quickly surface, and then the rest of the rc would be more normal. But no, I had straggling merge-window pull requests come in all week, and rc2 is bigger than I’d like.” Perhaps the most significant of those requests was for the overlayfsunion filesystem, which has finally been merged after years of trying.
Read more at LWN