For some reasons, you may want to suspend or resume write activity to an XFS file system, the xfs utility xfs_freeze can help you do that.
Suspending XFS file System write activity allows hardware-based device snapshots to be used to capture the file system in a consistent state.
The xfs_freeze utility is provided by the xfsprogs package, which is only available on x86_64.
To suspend (that is, freeze) an XFS file system
# xfs_freeze -f /mount/point
To unfreeze an XFS file system
# xfs_freeze -u /mount/point
When taking an LVM snapshot, it is not necessary to use xfs_freeze to suspend the file system first. Rather, the LVM management tools will automatically suspend the XFS file system before taking the snapshot.