On Tue, Jul 27, 2010 at 03:55:29PM +1000, Dave Chinner wrote: > From: Dave Chinner <dchinner@xxxxxxxxxx> > > XFS_IOC_ZERO_RANGE is the equivalent of an atomic XFS_IOC_UNRESVSP/ > XFS_IOC_RESVSP call pair. It enabled ranges of written data to be > turned into zeroes without requiring IO or having to free and > reallocate the extents in the range given as would occur if we had > to punch and then preallocate them separately. This enables > applications to zero parts of files very quickly without changing > the layout of the files in any way. This looks good minus the left over printks. It'll also needs xfstests coverage and a description in the xfsctl manpage. _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
