• Linus Torvalds's avatar
    Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax · dad4f140
    Linus Torvalds authored
    Pull XArray conversion from Matthew Wilcox:
     "The XArray provides an improved interface to the radix tree data
      structure, providing locking as part of the API, specifying GFP flags
      at allocation time, eliminating preloading, less re-walking the tree,
      more efficient iterations and not exposing RCU-protected pointers to
      its users.
    
      This patch set
    
       1. Introduces the XArray implementation
    
       2. Converts the pagecache to use it
    
       3. Converts memremap to use it
    
      The page cache is the most complex and important user of the radix
      tree, so converting it was most important. Converting the memremap
      code removes the only other user of the multiorder code, which allows
      us to remove the radix tree code that supported it.
    
      I have 40+ followup patches to convert many other users of the radix
      tree over to the XArray, but I'd like to get this part in first. The
      other conversions haven't been in linux-next and aren't suitable for
      applying yet, but you can see them in the xarray-conv branch if you're
      interested"
    
    * 'xarray' of git://git.infradead.org/users/willy/linux-dax: (90 commits)
      radix tree: Remove multiorder support
      radix tree test: Convert multiorder tests to XArray
      radix tree tests: Convert item_delete_rcu to XArray
      radix tree tests: Convert item_kill_tree to XArray
      radix tree tests: Move item_insert_order
      radix tree test suite: Remove multiorder benchmarking
      radix tree test suite: Remove __item_insert
      memremap: Convert to XArray
      xarray: Add range store functionality
      xarray: Move multiorder_check to in-kernel tests
      xarray: Move multiorder_shrink to kernel tests
      xarray: Move multiorder account test in-kernel
      radix tree test suite: Convert iteration test to XArray
      radix tree test suite: Convert tag_tagged_items to XArray
      radix tree: Remove radix_tree_clear_tags
      radix tree: Remove radix_tree_maybe_preload_order
      radix tree: Remove split/join code
      radix tree: Remove radix_tree_update_node_t
      page cache: Finish XArray conversion
      dax: Convert page fault handlers to XArray
      ...
    dad4f140
swap.c 28.6 KB