On Wed, Dec 18, 2024 at 08:10:48AM +0100, Christoph Hellwig wrote: > On Tue, Dec 17, 2024 at 09:14:47AM -0800, Darrick J. Wong wrote: > > > We've been thinking about that a lot. Right now we don't have an > > > immediate use case for it, but it sure would be nice to have it without > > > needing another incompat bit. But then we'd need to find some space > > > (3 bits to be exact) in the on-disk inode for it that doesn't make > > > otherwise useful space unavaіlable for more widely useful things. > > > If you have a good idea I'll look into implementing it. > > > > How about reusing the dmapi fields in xfs_dinode, seeing as we forced > > them to zero in the base metadir series? Or do you have another use in > > mind for those 6 bytes? > > I've always seen those a general space reserve for things that could > be useful for all inodes as they are fairly large and contiguous. For > these three bits I'd rather still them where it doesn't hurt too much. > But maybe I'm overthinking it. Is anyone planning to add persistent write hints to xfs files? --D
