tree 6a99818b0c54b71c706206bf8981e807e2b0a99b
parent 151a31b25e5c941bdd9fdefed650effca223c716
author Li Zefan <lizf@cn.fujitsu.com> 1314950215 +0800
committer David Sterba <dsterba@suse.cz> 1319127037 +0200

Btrfs: fix wrong max_to_defrag in btrfs_defrag_file()

It's off-by-one, and thus we may skip the last page while defragmenting.

An example case:

  # create /mnt/file with 2 4K file extents
  # btrfs fi defrag /mnt/file
  # sync
  # filefrag /mnt/file
  /mnt/file: 2 extents found

So it's not defragmented.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>