On Fri, Apr 20, 2018 at 08:55:38AM -0700, Eric Dumazet wrote: > This patch series provide a new mmap_hook to fs willing to grab > a mutex before mm->mmap_sem is taken, to ensure lockdep sanity. > > This hook allows us to shorten tcp_mmap() execution time (while mmap_sem > is held), and improve multi-threading scalability. Missing CC to linu-fsdevel and linux-mm that will have to decide. We've rejected this approach multiple times before, so you better make a really good argument for it. introducing a multiplexer that overloads a single method certainly doesn't help making that case.
