On 2011-03-02, at 13:23, Dave Chinner <david@xxxxxxxxxxxxx> wrote: > On Mon, Feb 28, 2011 at 11:42:48PM -0700, Andreas Dilger wrote: >> On 2011-02-28, at 8:08 PM, Allison Henderson wrote: >>> This first patch adds a function to convert a range of blocks >>> to an uninitialized extent. This function will >>> be used to first convert the blocks to extents before >>> punching them out. >> >> This was proposed as a separate function for FALLOCATE by Dave >> Chinner (based on XFS_IOC_ZERO_RANGE), so this is useful as a >> standalone function. > > XFS_IOC_ZERO_RANGE converts a range to unwritten extents, not > uninitialised extents. An uninitialised extent is one that is > allocated but had not data written to it (i.e. contains stale data), > while an unwritten/preallocated extent is guaranteed to contain > zeros. For ext4 at least there is no distinction at least. Still, it is good to use the right terms so that we are all on the same page. > This may be just a terminology issue, but we should try to > use the same jargon across all filesystems... Cheers, Andreas-- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
