Commit 452e62b7 authored May 26, 2017 by Liu Bo Committed by Chris Mason Jun 09, 2017

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>

parent 286b92f4

fs/btrfs/inode.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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)

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