Hi everyone, Christoph and I have been working on getting the long-delayed metadata directory tree patchset into mergeable shape, and now that it's fully reviewed, I want to push it for 6.13. Changes since 17 Oct include dealing with merge conflicts, adding some more tags, using the new experimental warning code for pnfs, fixing a refcounting bug, fixing some quota flag handling bugs, and porting xfs/122 to the kernel. I am sending the kernel patches one more time for posterity; pull requests will follow immediately after. -- The metadata directory tree sets us up for much more flexible metadata within an XFS filesystem. Instead of rooting inodes in the superblock which has very limited space, we instead create a directory tree that can contain arbitrary numbers of metadata files. Having done that, we can now shard the realtime volume into multiple allocation groups, much as we do with AGs for the data device. However, the realtime volume has a fun twist -- each rtgroup gets its own space metadata files, and for that we need a metadata directory tree. Note that we also implement busy free(d) extent tracking, which means that we can do discards asynchronously. Metadata directory trees and realtime groups also enable us to complete the realtime modernization project, which will add reverse mapping btrees, reflink, quota support, and zoned storage support for rt volumes. Finally, quota inodes now live in the metadata directory tree, which is a pretty simple conversion. However, we added yet another new feature, which is that xfs will now remember the quota accounting and enforcement state across unmounts. You can still tweak them via mount options, but not specifying any is no longer interpreted the same as 'noquota'. Quotas for the realtime are now supported. Please have a look at the git tree links for code changes: https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git/tag/?h=metadir_2024-11-05 https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfsprogs-dev.git/tag/?h=metadir_2024-11-05 https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfstests-dev.git/tag/?h=realtime-quotas_2024-11-05 --D
