[$] Filesystem medley: EROFS, NTFS, and XFS

Filesystems seem to be one of those many areas where the problems are wellunderstood, but there is always somebody working toward a better solution.As a result, filesystem development in the Linux kernel continues at a fastpace even after all these years. In recent news, the EROFS filesystem ison the path to gain a useful page-cache-sharing feature, there is a newNTFS implementation on the horizon, and XFS may be about to get aninfrastructure for self healing.