root@precise-X201:~# btrfs subvolume list -p /
ID 256 parent 5 top level 5 path @
ID 269 parent 5 top level 5 path @apt-snapshot-2012-02-06_10:57:25
ID 270 parent 269 top level 5 path @apt-snapshot-2012-02-06_10:57:25/@
ID 271 parent 5 top level 5 path @apt-snapshot-2012-02-06_10:57:26
ID 272 parent 271 top level 5 path @apt-snapshot-2012-02-06_10:57:26/@
ID 282 parent 5 top level 5 path @apt-snapshot-2012-02-07_10:39:29
ID 283 parent 282 top level 5 path @apt-snapshot-2012-02-07_10:39:29/@
ID 302 parent 5 top level 5 path @apt-snapshot-2012-02-21_11:31:14
ID 303 parent 302 top level 5 path @apt-snapshot-2012-02-21_11:31:14/@
ID 440 parent 5 top level 5 path @apt-snapshot-2012-04-23_14:12:51
ID 441 parent 440 top level 5 path @apt-snapshot-2012-04-23_14:12:51/@
ID 443 parent 5 top level 5 path @apt-snapshot-2012-05-02_12:56:59
ID 444 parent 443 top level 5 path @apt-snapshot-2012-05-02_12:56:59/@
I can confirm this:
root@precise- X201:~# btrfs subvolume list -p / 2012-02- 06_10:57: 25 2012-02- 06_10:57: 25/@ 2012-02- 06_10:57: 26 2012-02- 06_10:57: 26/@ 2012-02- 07_10:39: 29 2012-02- 07_10:39: 29/@ 2012-02- 21_11:31: 14 2012-02- 21_11:31: 14/@ 2012-04- 23_14:12: 51 2012-04- 23_14:12: 51/@ 2012-05- 02_12:56: 59 2012-05- 02_12:56: 59/@
ID 256 parent 5 top level 5 path @
ID 269 parent 5 top level 5 path @apt-snapshot-
ID 270 parent 269 top level 5 path @apt-snapshot-
ID 271 parent 5 top level 5 path @apt-snapshot-
ID 272 parent 271 top level 5 path @apt-snapshot-
ID 282 parent 5 top level 5 path @apt-snapshot-
ID 283 parent 282 top level 5 path @apt-snapshot-
ID 302 parent 5 top level 5 path @apt-snapshot-
ID 303 parent 302 top level 5 path @apt-snapshot-
ID 440 parent 5 top level 5 path @apt-snapshot-
ID 441 parent 440 top level 5 path @apt-snapshot-
ID 443 parent 5 top level 5 path @apt-snapshot-
ID 444 parent 443 top level 5 path @apt-snapshot-