KVM : Logical volume xxxx is used by another device.

If you facing an issue when try to remove KVM img, below is the workaround :

[root@ssdvps06 ~]# lvscan |grep kvm530
  ACTIVE            '/dev/ssdvps06data/kvm530_img' [120.00 GiB] inherit

[root@ssdvps06 ~]# lvchange -an /dev/ssdvps06data/kvm530_img
  Logical volume ssdvps06data/kvm530_img is used by another device.

Find Out device-mapper’s Mapping
Well, the culprit in this case seemed to be device-mapper creating a mapping which counted as ‘in-use’. Check for the mapping via:

[root@ssdvps06 ~]# dmsetup info -c | grep kvm530
ssdvps06data-kvm530_img1         253  72 L--w    0    1      0 part1-LVM-mCrb7RNRzIsZ2V3WP0kSJwoPwchSokeqcpJp3DxPS22509KmbuuIuq0v3ZUAfLDV
ssdvps06data-kvm530_img          253  51 L--w    1    1      0 LVM-mCrb7RNRzIsZ2V3WP0kSJwoPwchSokeqcpJp3DxPS22509KmbuuIuq0v3ZUAfLDV

Find Out Mapped Device
Then use that to find out what is holding it:

[root@ssdvps06 ~]# ls -la /sys/dev/block/253\:51/holders
total 0
drwxr-xr-x 2 root root 0 Sep 23 10:15 .
drwxr-xr-x 8 root root 0 Sep 23 10:15 ..
lrwxrwxrwx 1 root root 0 Oct  9 16:50 dm-72 -> ../../dm-72

Remove Device (via dmsetup remove)
Then do a dmsetup remove on that device-mapper device:

[root@ssdvps06 ~]# dmsetup remove /dev/dm-72

[root@ssdvps06 ~]# lvremove /dev/ssdvps06data/kvm530_img
Do you really want to remove active logical volume ssdvps06data/kvm530_img? [y/n]: y
  Logical volume "kvm530_img" successfully removed