Comment # 11 on bug 1006952 from zhilong liu

In addition steps;

linux-tjrh:~ # lvcreate -n lvtest -L 100M vg1 
  allocation/use_blkid_wiping=1 configuration setting is set while LVM is not
compiled with blkid wiping support.
  Falling back to native LVM signature detection.
  Logical volume "lvtest" created.
linux-tjrh:~ # lvs
  LV     VG  Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync
Convert
  lvtest vg1 -wi-a----- 100.00m                                                 
linux-tjrh:~ # modprobe dm-cache
linux-tjrh:~ # lvcreate --type cache -n CacheLV -L 100M vg1/lvtest /dev/loop1
  Using default stripesize 64.00 KiB.
  Default cache policy is not available.
linux-tjrh:~ # lvs
  LV          VG  Attr       LSize   Pool Origin Data%  Meta%  Move Log
Cpy%Sync Convert
  CacheLV vg1 Cwi---C--- 100.00m                                                
  lvtest      vg1 -wi-a----- 100.00m                                            
linux-tjrh:~ # lvs -o +cache_mode
  LV          VG  Attr       LSize   Pool Origin Data%  Meta%  Move Log
Cpy%Sync Convert CacheMode
  CacheLV vg1 Cwi---C--- 100.00m                                                
  lvtest      vg1 -wi-a----- 100.00m