I have a LVM volume that I formatted to BTRFS.
It gets full and I need to extend it.
Extending a LVM is usual, straight:
[mrakotomandimby@universe ~]$ sudo lvextend /dev/volgroup/vmware -L+150G Using stripesize of last segment 64.00 KiB Size of logical volume volgroup/vmware changed from 506.00 GiB (129536 extents) to 656.00 GiB (167936 extents). Logical volume volgroup/vmware successfully resized. [mrakotomandimby@universe ~]$
But we also need to resize the BTRFS living on it:
[mrakotomandimby@universe ~]$ sudo btrfs filesystem resize max /home/mrakotomandimby/vmware Resize device id 1 (/dev/mapper/volgroup-vmware) from 506.00GiB to max [mrakotomandimby@universe ~]$
That is all