Convert ext3 to ext4

[shmuel siegel]

Eric Sandeen wrote:
> although note the caveats there.  Existing files will not change their
> disk format to use extents... so it's not quite the same as if you had
> just done ext4 from scratch.  Still worth testing, though, and should
> still be beneficial.
>
> -Eric
>   
As yum slowly changes everything in the world, will the new files be 
using ext4?