thin provisioned VM not registering provisioned space

[JustTurned50]

I have a RHEL 5.5 thin provisioned VM which exhibits this problem:

[root@imp2 ~]# vgs
  VG         #PV #LV #SN Attr   VSize  VFree
  VolGroup00   1   2   0 wz--n- 11.88G    0
[root@imp2 ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                      7.8G  7.5G     0 100% /

That is, lvm is able to see that it has almost 12 gig disk but df reports only an 8 gig disk.

At this point, yum update fails indicating not enough space.

reboot has not helped.

I'm not seeing this reported widely via Google so what did I miss?

[DSTAVERT]

Is all the space alocated? vgdisplay  Was the lvm volume extended?

[JustTurned50]

[root@imp2 ~]# vgdisplay
  --- Volume group ---
  VG Name               VolGroup00
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               11.88 GB
  PE Size               32.00 MB
  Total PE              380
  Alloc PE / Size       380 / 11.88 GB
  Free  PE / Size       0 / 0

[JustTurned50]

Apologies. It appears I gave this VM a large swap space...cannot imagine why.

[root@imp2 ~]# lvdisplay
  --- Logical volume ---
  LV Name                /dev/VolGroup00/LogVol00
  VG Name                VolGroup00
  LV UUID                ZAPDDF-H6nq-G8UF-pxIg-XjmF-Dnen-TJh2v3
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                8.00 GB
  Current LE             256
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0

  --- Logical volume ---
  LV Name                /dev/VolGroup00/LogVol01
  VG Name                VolGroup00
  LV UUID                qhPB2P-x9sy-v4I1-LA96-jVNL-KeU1-JmaEq4
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                3.88 GB
  Current LE             124
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:1