[PATCH v2 00/10] btrfs: inode management and memory consumption improvements

[fdmanana@kernel.org]

From: Filipe Manana <fdmanana@suse.com>

Some inode related improvements, to use an xarray to track open inodes per
root instead of a red black tree, reduce lock contention and use less memory
per btrfs inode, so now we can fit 4 inodes per 4K page instead of 3.
More details in the change logs.

V2: Added two more patches (9/10 and 10/10) to make sure btrfs_inode size
    is reduced to 1024 bytes when CONFIG_FS_ENCRYPTION and CONFIG_FS_VERITY
    are set. I wasn't using these configs before, and with them the final
    size for btrfs_inode was 1032 bytes and not 1016 bytes as I initially
    had - now the final size is 1024 bytes with those configs enabled.

Filipe Manana (10):
  btrfs: use an xarray to track open inodes in a root
  btrfs: preallocate inodes xarray entry to avoid transaction abort
  btrfs: reduce nesting and deduplicate error handling at btrfs_iget_path()
  btrfs: remove inode_lock from struct btrfs_root and use xarray locks
  btrfs: unify index_cnt and csum_bytes from struct btrfs_inode
  btrfs: don't allocate file extent tree for non regular files
  btrfs: remove location key from struct btrfs_inode
  btrfs: remove objectid from struct btrfs_inode on 64 bits platforms
  btrfs: rename rb_root member of extent_map_tree from map to root
  btrfs: use a regular rb_root instead of cached rb_root for extent_map_tree

 fs/btrfs/btrfs_inode.h            | 130 ++++++++++----
 fs/btrfs/ctree.h                  |   8 +-
 fs/btrfs/delayed-inode.c          |  29 ++-
 fs/btrfs/disk-io.c                |  12 +-
 fs/btrfs/export.c                 |   2 +-
 fs/btrfs/extent_map.c             |  50 +++---
 fs/btrfs/extent_map.h             |   2 +-
 fs/btrfs/file-item.c              |  13 +-
 fs/btrfs/inode.c                  | 286 +++++++++++++++---------------
 fs/btrfs/ioctl.c                  |   8 +-
 fs/btrfs/relocation.c             |  12 +-
 fs/btrfs/tests/btrfs-tests.c      |   5 +-
 fs/btrfs/tests/extent-map-tests.c |   6 +-
 fs/btrfs/tree-log.c               |   9 +-
 14 files changed, 317 insertions(+), 255 deletions(-)

-- 
2.43.0