Hi all, Following in the theme of the last two patchsets, this one strengthens the rmap btree record checking so that scrub can count the number of space records that map to a given owner and that do not map to a given owner. This enables us to determine exclusive ownership of space that can't be shared. If you're going to start using this mess, you probably ought to just pull from my git trees, which are linked below. This is an extraordinary way to destroy everything. Enjoy! Comments and questions are, as always, welcome. --D kernel git tree: https://git.kernel.org/cgit/linux/kernel/git/djwong/xfs-linux.git/log/?h=scrub-detect-rmapbt-gaps xfsprogs git tree: https://git.kernel.org/cgit/linux/kernel/git/djwong/xfsprogs-dev.git/log/?h=scrub-detect-rmapbt-gaps --- fs/xfs/libxfs/xfs_rmap.c | 198 ++++++++++++++++++++++++++++++++-------------- fs/xfs/libxfs/xfs_rmap.h | 18 +++- fs/xfs/scrub/agheader.c | 10 +- fs/xfs/scrub/bmap.c | 14 +++ fs/xfs/scrub/btree.c | 2 fs/xfs/scrub/ialloc.c | 4 - fs/xfs/scrub/inode.c | 2 fs/xfs/scrub/rmap.c | 45 ++++++---- fs/xfs/scrub/scrub.h | 2 9 files changed, 198 insertions(+), 97 deletions(-)