[$] Network filesystem topics

At the 2018 Linux Storage, Filesystem, andMemory-Management Summit (LSFMM), Steve French led a discussion of variousproblem areas for network filesystems. Unlike previous sessions (in 2016 and 2017), there was some good news to reportbecause the long-awaited statx()system call was released in Linux 4.11. But thereis still plenty of work to be done to better support network filesystems inLinux.