XFS has been officially merged

[m.w.chang]

does the current XFS release have a single command for dummies to 
convert the root partition from ext2fs into XFS without one bit of 
error? ext3 doesn't invole a reformat when installing it.

Andrew Mathews wrote:
> For the rest of you XFS filesystem fans, Linus has merged XFS into the 
> kernel. <quote>
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