[$] Zoned storage and filesystems

Issues around zoned storage for filesystems was the topic of a combinedstorage and filesystem session at 2023 Linux Storage, Filesystem,Memory-Management and BPF Summit led byBart Van Assche, Viacheslav A. Dubeyko, and Naohiro Aota. Zoned storage began with theadvent of shingledmagnetic recording (SMR) devices, but is now implemented by NVMe zonednamespaces (ZNS) as well.SMR devices can have multiple zones with differentcharacteristics, with some zones that can only be written in sequentialorder, while other, conventional zones can be written in any order. Thetalk was focused on filesystems using the sequential type of zonessince the conventional zones are already well-supported in Linux and itsfilesystems.