xfs_fsr not defragging properly?

[Juha K Kallio <bunnyh@xxxxxxxxxxxxxxxxxxxxxxxxxxx>]

I have a 80GB partition with many files with variable sizes that is 76% full 
ATM. I've noticed that there are some 
inodes that xfs_fsr never defrags (eg. "No improvement made: ino=156196115"), 
even though there certainly is enough
space (19GB) for the file (less than 1GB). What's the cause for this? If 
there's no consistent space for the inode to 
fit in to, shouldn't the program re-organize other inodes to make that space?