Re: [XFS Tests Punch Hole 2/3 v3] XFS TESTS: Add Fallocate Punch Hole Test Routines

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On Thu, May 19, 2011 at 11:31:44AM +1000, Dave Chinner wrote:
> > +#
> > +# This test is successful when the following conditions are met:
> > +#  - ls shows that the number of blocks occupied by the file
> > +#    has decreased by the number of blocks punched out.
> 
> There's no guarantee that a filesystem will punch the number of
> blocks you expect.

	Cluster allocated filesystems like ocfs2 are certainly going to
punch some multiple of clusters, not exact blocks.  Eg if the hole is
punched in the middle of a cluster.

Joel

-- 

Life's Little Instruction Book #464

	"Don't miss the magic of the moment by focusing on what's
	 to come."

			http://www.jlbec.org/
			jlbec@xxxxxxxxxxxx

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