[PATCH 0/3] btrfs: make extent buffer memory continuous

[Qu Wenruo <wqu@suse.com>]

[CHANGELOG]
RFC->v1:
- Rebased to the latest misc-next branch
  Just a small conflicts in extent_buffer_memmove().

- Further cleanup the extent buffer bitmap operations

[REPO]
https://github.com/adam900710/linux/tree/eb_page_cleanups

This includes the submitted extent buffer accessors cleanup as
the dependency.

[BACKGROUND]
We have a lot of extent buffer code addressing the cross-page accesses, on
the other hand, other filesystems like XFS is mapping its xfs_buf into
kernel virtual address space, so that they can access the content of
xfs_buf without bothering the page boundaries.

[OBJECTIVE]
This patchset is mostly learning from the xfs_buf, to greatly simplify
the extent buffer accessors.

Now all the extent buffer accessors are turned into wrappers of
memcpy()/memcmp()/memmove().

For now, it can pass test cases from btrfs group without new
regressions.

Qu Wenruo (3):
  btrfs: warn on tree blocks which are not nodesize aligned
  btrfs: map uncontinuous extent buffer pages into virtual address space
  btrfs: utilize the physically/virtually continuous extent buffer
    memory

 fs/btrfs/disk-io.c   |  18 +--
 fs/btrfs/extent_io.c | 360 +++++++++++++------------------------------
 fs/btrfs/extent_io.h |  17 ++
 fs/btrfs/fs.h        |   7 +
 4 files changed, 139 insertions(+), 263 deletions(-)

-- 
2.41.0