Need to resize my lv_root, any tips?

[mark_nl (Mark Verlinde)]

After you did made backups (and a disk-clone)

Maybe this helps:

Resize partition, decrease partition

Take look here http://yallalabs.com/linux/how-to-reduce-shrink-the-size-of-a-lvm-partition-formatted-with-xfs-filesystem/ Also https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/storage_administration_guide/xfsrepair