can I shrink an xfs?

[Louis-David Mitterrand <vindex+lists-xfs@xxxxxxxxxxx>]

Hi,

Is it possible to shrink an xfs? I tried using xfs_growfs to no avail.

        zenon:~# xfs_growfs -D 650000000 /backup
        meta-data=/dev/md2               isize=256    agcount=32, 
agsize=20539552 blks
                         =                       sectsz=4096  attr=1
        data     =                       bsize=4096   blocks=657265248, 
imaxpct=25
                         =                       sunit=16     swidth=48 blks
        naming   =version 2              bsize=4096  
        log      =internal               bsize=4096   blocks=32768, version=2
                         =                       sectsz=4096  sunit=1 blks, 
lazy-count=0
        realtime =none                   extsz=196608 blocks=0, rtextents=0
        data size 650000000 too small, old size is 657265248

... even though the fs is 80% full only.

Thanks,