Mine finished sometime late yesterday after I called it a night... It completely defragmented files. I'm talking 0% fragmentation! Directory fragmentation remained the same as before.
Before Stats:
#xfs_db -r /dev/md2
xfs_db> frag
actual 17087, ideal 15986, fragmentation factor 6.44%
xfs_db> frag -f
actual 16522, ideal 15513, fragmentation factor 6.11%
xfs_db> frag -d
actual 565, ideal 473, fragmentation factor 16.28%
After stats:
# xfs_db -c frag -r /dev/md2
actual 16078, ideal 15986, fragmentation factor 0.57%
# xfs_db -c 'frag -f' -r /dev/md2
actual 15513, ideal 15513, fragmentation factor 0.00%
# xfs_db -c 'frag -d' -r /dev/md2
actual 565, ideal 473, fragmentation factor 16.28%