Hi all, This patchset enables sysadmins to upgrade an existing filesystem to use large extent counts. v4: get rid of the free space checks entirely since none of the supported features actually use up any disk space v3: don't allow upgrades for filesystems that are more than 90 percent full because we just dont want to go there v2: pull in patches from chandan/dave 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 xfsprogs git tree: https://git.kernel.org/cgit/linux/kernel/git/djwong/xfsprogs-dev.git/log/?h=nrext64-upgrade --- include/xfs_mount.h | 1 libxfs/init.c | 24 +++++--- libxfs/libxfs_api_defs.h | 3 + man/man8/xfs_admin.8 | 7 ++ repair/globals.c | 1 repair/globals.h | 1 repair/phase2.c | 137 +++++++++++++++++++++++++++++++++++++++++++--- repair/xfs_repair.c | 11 ++++ 8 files changed, 168 insertions(+), 17 deletions(-)