what is going on with "/dev/dm"

[Gene Czarcinski]

Oops ... do we have a new "feature"?  I do not like this one.

Whereas, the results of "df" was something of the form:
/dev/mapper/<whatever>

I am now getting on my f12 alpha/rawhide sytem:
/dev/dm-<number>

Doing a little search of the mailing list archives, I find the entry dated 
around 2 July:

================================================================================
 e2fsprogs-1.41.4-12.fc11 (FEDORA-2009-7278)
 Utilities for managing ext2, ext3, and ext4 filesystems
--------------------------------------------------------------------------------
ChangeLog:

* Wed Jun 24 2009 Eric Sandeen <sandeen at redhat.com> 1.41.4-12
- blkid: use /dev/mapper/<name> vs /dev/dm-<N> (#497259)
* Thu Jun 18 2009 Eric Sandeen <sandeen at redhat.com> 1.41.4-11
- Update journal backup blocks in sb after resize (#505339)
- Fix memory leak in extent handling functions
--------------------------------------------------------------------------------
References:

  [ 1 ] Bug #505339 - error still found with fsck after resizing during live 
image creation
        https://bugzilla.redhat.com/show_bug.cgi?id=505339
  [ 2 ] Bug #507461 - blkid returns dm-* for UUIDs instead of /dev/mapper name
        https://bugzilla.redhat.com/show_bug.cgi?id=507461
  [ 3 ] Bug #497259 - F10-F11: /dev/dm-N devices cause loss of all rescue 
ability
        https://bugzilla.redhat.com/show_bug.cgi?id=497259
-------------------------------------------------------------------------------

Is this new "feature" something we are going to have to live with??

Gene