Btrfs: clear EXTENT_DEFRAG bits in finish_ordered_io

Before this, we use 'filled' mode here, ie. if all range has been
filled with EXTENT_DEFRAG bits, get to clear it, but if the defrag
range joins the adjacent delalloc range, then we'll have EXTENT_DEFRAG
bits in extent_state until releasing this inode's pages, and that
prevents extent_data from being freed.

This clears the bit if any was found within the ordered extent.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 3fc3e10594a4af729ea8017fd050cf80dff94270..ef3c98c527c136c89b081f5fb0c4ebd414105cbe 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2952,7 +2952,7 @@ static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent)
 
        ret = test_range_bit(io_tree, ordered_extent->file_offset,
                        ordered_extent->file_offset + ordered_extent->len - 1,
-                       EXTENT_DEFRAG, 1, cached_state);
+                       EXTENT_DEFRAG, 0, cached_state);
        if (ret) {
                u64 last_snapshot = btrfs_root_last_snapshot(&root->root_item);
                if (0 && last_snapshot >= BTRFS_I(inode)->generation)