Files full of zeros with coreutils-8.11 and xfs (FIEMAP related?)

[Ted Ts'o]

On Tue, Apr 19, 2011 at 05:45:38PM +1000, Dave Chinner wrote:
> You are *not listening*. There is no #2. FIEMAP returns the extent
> state _on disk_ at the time of the call.

Dave, you're being rather strident about your insistence about what
FIEMAP's semantics are.  Part of the problem here is that it's *not*
clear or settled.

If it really is the state _on_ _disk_, does XFS really have a DELALLOC
bit _on_ _disk_?

					- Ted