On Tue, May 10, 2022 at 02:29:35AM -0700, Christoph Hellwig wrote: > On Mon, May 09, 2022 at 11:20:43AM -0700, Darrick J. Wong wrote: > > > Is there any a priori NACK or exceptional challenges w.r.t implementing > > > upgrade of xfs to reflink support? > > > > No, just lack of immediate user demand + time to develop and merge code > > + time to QA the whole mess to make sure it doesn't introduce any > > messes. > > I also have vague memory I did an in-kernel online upgrade back in the > day but we decided to not bother in the end. Maybe some list archive > search could find it. https://lore.kernel.org/linux-xfs/1464877150-20457-1-git-send-email-hch@xxxxxx/ Note that your version did live upgrades of mounted filesystems whereas the one I wrote does it as part of xfs_repair, which means we have a somewhat better guarantee that the fs will be in decent shape afterwards. --D
