+porting
+ - various information on filesystem porting.
+proc.txt
+ - info on Linux's /proc filesystem.
+ramfs-rootfs-initramfs.txt
+ - info on the 'in memory' filesystems ramfs, rootfs and initramfs.
+reiser4.txt
+ - info on the Reiser4 filesystem based on dancing tree algorithms.
+relay.txt
+ - info on relay, for efficient streaming from kernel to user space.