Hi all, This is the sixth revision of a patchset that updates the xfs documentation for tracking reverse-mappings of physical blocks to file and metadata (rmap); support for mapping multiple file logical blocks to the same physical block (reflink); and implements the beginnings of online metadata scrubbing. Given the significant amount of design assumptions that change with block sharing, rmap and reflink are provided together. There shouldn't be any incompatible on-disk format changes, pending a thorough review of the patches within. This patch set does the following: * Adds a chapter discussing the importance of thoroughly testing new disk format changes with xfstests, and how to find the source code. * Adds in all the disk format changes for Linux 4.5. * Separates the btree sections into a separate chapter about the generic btree structure, and adds a section about the new support for overlapped interval records. * Adds chapters discussing reflink, the reference count btree, and * the reserve-mapping btree. If you're going to start using this mess, you probably ought to just pull from my github trees for kernel[1], xfsprogs[2], and xfstests[3]. There are also updates for xfs-docs[4]. The kernel patches should apply to dchinner's for-next; xfsprogs patches to for-next; and xfstest to master. The kernel git tree already has for-next included. The patches have been xfstested with x64, i386, and armv7l--arm64, ppc64, and ppc64le no longer boot in qemu. All three architectures pass all 'clone' group tests except xfs/128 (which is the swapext test), and AFAICT don't cause any new failures for the 'auto' group. This is an extraordinary way to eat your data. Enjoy! Comments and questions are, as always, welcome. --D [1] https://github.com/djwong/linux/tree/djwong-devel [2] https://github.com/djwong/xfsprogs/tree/djwong-devel [3] https://github.com/djwong/xfstests/tree/djwong-devel [4] https://github.com/djwong/xfs-documentation/tree/djwong-devel _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
