df-possible-bug

root@rika:~# ls -l /dev/rika/root
lrwxrwxrwx 1 root root 19 2012-02-02 18:55 /dev/rika/root -> ../mapper/rika-root
root@rika:~# df -hT /dev/rika/root
Filesystem    Type    Size  Used Avail Use% Mounted on
none      devtmpfs    497M  232K  496M   1% /dev
root@rika:~# df -hT /dev/mapper/rika-root
Filesystem    Type    Size  Used Avail Use% Mounted on
/dev/mapper/rika-root
              ext4     18G  1.1G   16G   7% /
root@rika:~#