On Thu, Feb 06, 2025 at 12:52:49PM -0800, Darrick J. Wong wrote: > On Thu, Feb 06, 2025 at 07:44:27AM +0100, Christoph Hellwig wrote: > > There is no point in reserving more space than actually available > > on the data device for the worst case scenario that is unlikely to > > happen. Reserve at most 1/4th of the data device blocks, which is > > still a heuristic. > > I wonder if this should be a bugfix for 6.14? Since one could format a > filesystem with a 1T data volume and a 200T rt volume and immediately be > out of space on the data volume. Yeah. But for this to be safe I think we also need the previous patch to sitch to the global reservations. Which at least in the current form sits on top of the freecounter refactoring..