From: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx> I'd like to thank Andrew for taking the first eight XArray patches into -next. He's understandably nervous about taking the rest of the patches into -next given how few of the remaining patches have review tags on them. So ... if you're on the cc, I'd really appreciate a review on something that you feel somewhat responsible for, eg the particular filesystem (nilfs, f2fs, lustre) that I've touched, or something in the mm/ or fs/ directories that you've worked on recently. This is against next-20180329. Patch 1 is just cleanup of a couple of merge glitches. You can ignore this one, unless you're Andrew Morton, in which case I'd appreciate it being added to -next. Patch 2 is huge and mostly mechanical and boring. Probably best to ignore it. Patches 3-16 are the XArray implementation. You don't have to read through them unless you really want to. If you're going to look at anything, spotting where I have gaps in the test-suite would probably be a good use of time. Some of the tests aren't added until much later in the series (eg some of the xa_load tests aren't added until xa_store is added because it's a pain to use the radix tree API to do the stores and then use the XArray API to do the loads). Patches 17-45 are generic code. This is where I could really use some review. Each one is pretty small, usually only touching a single function. It should bisect perfectly to any point in this series because the radix tree & XArray are interoperable (for now ...). It should be easy to review. If not, let me know. Patch 46 is btrfs and has been reviewed by David Sterba. Yay! Patches 47-48 are more generic code. Hmm, probably should have reordered them to be with 17-37. This is what I get for working alphabetically. Patches 49-51 are individual filesystems. If you're an expert in that filesystem, please test and be sure I didn't break you. Patches 52-60 are DAX patches. I just redid the DAX patches and I'm finally happy with how this part of the series came out; I think it should be much easier to review, and I even fixed a few minor bugs. Patches 61 & 62 are the icing on the cake, just some small cleanups. I'm sure everybody wants to review patch 62 since it's just deleting unused code. Changes from v9: - Rebased on next-20180329 - Added XA_STATE_ORDER - Decided that xas_load should return non-NULL if *any* entry overlapping the specified range is non-NULL (it won't necessarily be any of the entries in the range) - Added test suite for both above items - Redid DAX XArray conversion; should be easier to review now. Matthew Wilcox (62): page cache: Use xa_lock xarray: Replace exceptional entries xarray: Change definition of sibling entries xarray: Add definition of struct xarray xarray: Define struct xa_node xarray: Add documentation xarray: Add xa_load xarray: Add xa_get_tag, xa_set_tag and xa_clear_tag xarray: Add xa_store xarray: Add xa_cmpxchg and xa_insert xarray: Add xa_for_each xarray: Add xa_extract xarray: Add xa_destroy xarray: Add xas_next and xas_prev xarray: Add xas_create_range xarray: Add MAINTAINERS entry page cache: Rearrange address_space page cache: Convert hole search to XArray page cache: Add and replace pages using the XArray page cache: Convert page deletion to XArray page cache: Convert page cache lookups to XArray page cache: Convert delete_batch to XArray page cache: Remove stray radix comment page cache: Convert filemap_range_has_page to XArray mm: Convert page-writeback to XArray mm: Convert workingset to XArray mm: Convert truncate to XArray mm: Convert add_to_swap_cache to XArray mm: Convert delete_from_swap_cache to XArray mm: Convert __do_page_cache_readahead to XArray mm: Convert page migration to XArray mm: Convert huge_memory to XArray mm: Convert collapse_shmem to XArray mm: Convert khugepaged_scan_shmem to XArray pagevec: Use xa_tag_t shmem: Convert replace to XArray shmem: Convert shmem_confirm_swap to XArray shmem: Convert find_swap_entry to XArray shmem: Convert shmem_add_to_page_cache to XArray shmem: Convert shmem_alloc_hugepage to XArray shmem: Convert shmem_free_swap to XArray shmem: Convert shmem_partial_swap_usage to XArray memfd: Convert shmem_tag_pins to XArray memfd: Convert shmem_wait_for_pins to XArray shmem: Comment fixups btrfs: Convert page cache to XArray fs: Convert buffer to XArray fs: Convert writeback to XArray nilfs2: Convert to XArray f2fs: Convert to XArray lustre: Convert to XArray dax: Fix use of zero page dax: dax_insert_mapping_entry always succeeds dax: Rename some functions dax: Hash on XArray instead of mapping dax: Convert dax_insert_pfn_mkwrite to XArray dax: Convert dax_layout_busy_page to XArray dax: Convert __dax_invalidate_entry to XArray dax: Convert dax writeback to XArray dax: Convert page fault handlers to XArray page cache: Finish XArray conversion radix tree: Remove unused functions Documentation/core-api/index.rst | 1 + Documentation/core-api/xarray.rst | 361 +++++ MAINTAINERS | 12 + arch/nds32/include/asm/cacheflush.h | 4 +- arch/powerpc/include/asm/book3s/64/pgtable.h | 4 +- arch/powerpc/include/asm/nohash/64/pgtable.h | 4 +- drivers/gpu/drm/i915/i915_gem.c | 17 +- drivers/staging/lustre/lustre/llite/glimpse.c | 12 +- drivers/staging/lustre/lustre/mdc/mdc_request.c | 16 +- fs/btrfs/compression.c | 6 +- fs/btrfs/extent_io.c | 12 +- fs/buffer.c | 14 +- fs/dax.c | 768 +++++------ fs/ext4/inode.c | 2 +- fs/f2fs/data.c | 5 +- fs/f2fs/dir.c | 5 +- fs/f2fs/inline.c | 6 +- fs/f2fs/node.c | 10 +- fs/fs-writeback.c | 25 +- fs/gfs2/aops.c | 2 +- fs/inode.c | 2 +- fs/nfs/blocklayout/blocklayout.c | 2 +- fs/nilfs2/btnode.c | 37 +- fs/nilfs2/page.c | 72 +- fs/proc/task_mmu.c | 2 +- include/linux/fs.h | 63 +- include/linux/pagemap.h | 10 +- include/linux/pagevec.h | 8 +- include/linux/radix-tree.h | 110 +- include/linux/swap.h | 22 +- include/linux/swapops.h | 19 +- include/linux/xarray.h | 1008 ++++++++++++++ lib/Makefile | 2 +- lib/idr.c | 65 +- lib/radix-tree.c | 535 ++------ lib/xarray.c | 1681 +++++++++++++++++++++++ mm/filemap.c | 723 ++++------ mm/huge_memory.c | 17 +- mm/khugepaged.c | 177 +-- mm/madvise.c | 2 +- mm/memcontrol.c | 2 +- mm/memfd.c | 102 +- mm/migrate.c | 41 +- mm/mincore.c | 2 +- mm/page-writeback.c | 63 +- mm/readahead.c | 10 +- mm/shmem.c | 198 ++- mm/swap.c | 6 +- mm/swap_state.c | 119 +- mm/truncate.c | 27 +- mm/vmscan.c | 2 +- mm/workingset.c | 71 +- tools/include/linux/spinlock.h | 13 +- tools/testing/radix-tree/.gitignore | 2 + tools/testing/radix-tree/Makefile | 15 +- tools/testing/radix-tree/benchmark.c | 91 -- tools/testing/radix-tree/idr-test.c | 6 +- tools/testing/radix-tree/linux/bug.h | 1 + tools/testing/radix-tree/linux/kconfig.h | 1 + tools/testing/radix-tree/linux/kernel.h | 5 + tools/testing/radix-tree/linux/lockdep.h | 11 + tools/testing/radix-tree/linux/rcupdate.h | 2 + tools/testing/radix-tree/linux/xarray.h | 3 + tools/testing/radix-tree/multiorder.c | 270 +--- tools/testing/radix-tree/regression1.c | 68 +- tools/testing/radix-tree/test.c | 53 +- tools/testing/radix-tree/test.h | 6 + tools/testing/radix-tree/xarray-test.c | 594 ++++++++ 68 files changed, 5008 insertions(+), 2619 deletions(-) create mode 100644 Documentation/core-api/xarray.rst create mode 100644 lib/xarray.c create mode 100644 tools/testing/radix-tree/linux/kconfig.h create mode 100644 tools/testing/radix-tree/linux/lockdep.h create mode 100644 tools/testing/radix-tree/linux/xarray.h create mode 100644 tools/testing/radix-tree/xarray-test.c -- 2.16.2
