Dave Chinner wrote:
xfs_bmap provides an atomic sync and mapping. If the FIEMAP_FLAG_SYNC is pushed down to the filesystem, then XFS and all other filesystems can provide that same atomicity if desired.
That is exactly what I was afraid of. We are back to the "because XFS has it" argument. But many other filesystems won't be able to provide atomicity without normal operation performance being reduced. And I say we don't want fiemap to hurt normal operation so fiemap should not impose even an implied need for atomicity because programmers will expect it and code for it. If XFS users want atomic SYNC, they can use xfs_bmap, or if XFS wants, it can always sync in its fiemap. jim -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
