On Tue, Dec 13, 2022 at 06:29:24PM +0100, Andrey Albershteyn wrote: > Not yet implemented: > - No pre-fetching of Merkle tree pages in the > read_merkle_tree_page() This would be helpful, but not essential. > - No marking of already verified Merkle tree pages (each read, the > whole tree is verified). This is essential to have, IMO. You *could* do what btrfs does, where it caches the Merkle tree pages in the inode's page cache past i_size, even though btrfs stores the Merkle tree separately from the file data on-disk. However, I'd guess that the other XFS developers would have an adversion to that approach, even though it would not affect the on-disk storage. The alternatives would be to create a separate in-memory-only inode for the cache, or to build a custom cache with its own shrinker. - Eric
