On Wed, 28 Jul 2021, Wang Yugui wrote: > Hi, > > We no longer need the dummy inode(BTRFS_FIRST_FREE_OBJECTID - 1) in this > patch serials? No. > > I tried to backport it to 5.10.x, but it failed to work. > No big modification in this 5.10.x backporting, and all modified pathes > are attached. I'm not surprised, but I doubt there would be a major barrier to making it work. I'm unlikely to try until I have more positive reviews. Thanks, NeilBrown