With the introduction of the per-vma locking in the pagefault handler, the VMA tree is beginning to be used without the mmap_lock taken at all. I'd like to talk about where we are in the process of RCU-protected VMA walks, and where we are headed with a discussion around problems which may arise and some mitigation ideas. AKA: The annual mmap_sem/mmap_lock talk - And this time we mean it!
