Public bug reported:

Binary package hint: lvm2

I have a vg with 238464 free PEs.  Yet, any attempt to extend it returns
the above error message.

# lvm version
  LVM version:     2.02.54(1) (2009-10-26)
  Library version: 1.02.39 (2009-10-26)
  Driver version:  4.17.0

# vgdisplay data_vg
  --- Volume group ---
  VG Name               data_vg
  System ID             
  Format                lvm2
  Metadata Areas        12
  Metadata Sequence No  6
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               0
  Max PV                0
  Cur PV                12
  Act PV                12
  VG Size               5.46 TiB
  PE Size               8.00 MiB
  Total PE              715392
  Alloc PE / Size       476928 / 3.64 TiB
  Free  PE / Size       238464 / 1.82 TiB
  VG UUID               NPgp1H-6kkG-c4wL-KNyT-AVoh-Frlb-4nvfiT

root@haggis:~# lvextend -v -l+100%FREE data_vg/data_lv
    Finding volume group data_vg
  Using stripesize of last segment 8.00 MiB
    Archiving volume group "data_vg" metadata (seqno 6).
  Extending logical volume data_lv to 5.46 TiB
  Insufficient suitable allocatable extents for logical volume data_lv: 238464 
more required

root@haggis:~# lvextend -v -l+50%FREE data_vg/data_lv
    Finding volume group data_vg
  Using stripesize of last segment 8.00 MiB
    Archiving volume group "data_vg" metadata (seqno 6).
  Extending logical volume data_lv to 4.55 TiB
  Insufficient suitable allocatable extents for logical volume data_lv: 119232 
more required

root@haggis:~# lvextend -v -l+10%FREE data_vg/data_lv
    Finding volume group data_vg
  Using stripesize of last segment 8.00 MiB
  Rounding size (500774 extents) down to stripe boundary size for segment 
(500768 extents)
    Archiving volume group "data_vg" metadata (seqno 6).
  Extending logical volume data_lv to 3.82 TiB
  Insufficient suitable allocatable extents for logical volume data_lv: 23840 
more required

** Affects: lvm2 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/769930

Title:
  Insufficient suitable allocatable extents, even though they do exist

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