Display what extents are allocated on the physical volume to logical volume

We can see what extents are allocated on the physical volume

NAME
       pvdisplay - Display various attributes of physical volume(s)
   
pvdisplay shows the attributes of PVs, like size, physical extent size, space used for the VG descriptor area, etc. Here pvdisplay along with options --maps will show the what extents are allocated on the physical volume to the lv.

[root@nsk postfix]# pvdisplay --maps /dev/sda2
  --- Physical volume ---
  PV Name                /dev/sda2
  VG Name                centos
  PV Size                  <19.00 GiB / not usable 3.00 MiB
  Allocatable              yes (but full)
  PE Size                   4.00 MiB
  Total PE                   4863
  Free PE                   0
  Allocated PE           4863
  PV UUID                 DQjmHN-fso4-Mu4t-3l1V-Yogj-ksTH-ROFiK7

  --- Physical Segments ---
  Physical extent 0 to 511:
    Logical volume      /dev/centos/swap
    Logical extents      0 to 511
  Physical extent 512 to 4862:
    Logical volume      /dev/centos/root
    Logical extents      0 to 4350

Here,
         -m  --maps  Display the mapping of physical extents to LVs and logical extents.