Hi all, This patch documents the metadata directory tree feature. If you're going to start using this code, I strongly recommend pulling from my git trees, which are linked below. Comments and questions are, as always, welcome. kernel git tree: https://git.kernel.org/cgit/linux/kernel/git/djwong/xfs-linux.git/log/?h=metadir xfsprogs git tree: https://git.kernel.org/cgit/linux/kernel/git/djwong/xfsprogs-dev.git/log/?h=metadir fstests git tree: https://git.kernel.org/cgit/linux/kernel/git/djwong/xfstests-dev.git/log/?h=metadir xfsdocs git tree: https://git.kernel.org/cgit/linux/kernel/git/djwong/xfs-documentation.git/log/?h=metadir --- .../allocation_groups.asciidoc | 23 +++ .../internal_inodes.asciidoc | 142 ++++++++++++++++++++ .../XFS_Filesystem_Structure/ondisk_inode.asciidoc | 5 + 3 files changed, 165 insertions(+), 5 deletions(-)