Added Cc's * Liam R. Howlett <Liam.Howlett@xxxxxxxxxx> [240119 11:42]: > 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. Thanks to Suren for this [1] work, I should have included the reference in the first email. There are more patch sets that increases the impact of the locks, but I believe v4 that I've linked is the start of the RCU use of the maple tree. > > 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. There are some loose ends left in this work that we're still discussing and working through and I think it would be beneficial to hash some of it out in person, and have a wider audience exposure. > > AKA: The annual mmap_sem/mmap_lock talk - And this time we mean it! > [1] https://lore.kernel.org/linux-mm/20230227173632.3292573-1-surenb@xxxxxxxxxx/
