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Commit a09a0a70 authored by Liu Bo's avatar Liu Bo Committed by Chris Mason
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Btrfs: get better concurrency for snapshot-aware defrag work



Using spinning case instead of blocking will result in better concurrency
overall.

Signed-off-by: default avatarLiu Bo <bo.li.liu@oracle.com>
Signed-off-by: default avatarJosef Bacik <jbacik@fusionio.com>
Signed-off-by: default avatarChris Mason <chris.mason@fusionio.com>
parent de3cb945
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+3 −0
Original line number Diff line number Diff line
@@ -2312,6 +2312,7 @@ static noinline int relink_extent_backref(struct btrfs_path *path,
	key.type = BTRFS_EXTENT_DATA_KEY;
	key.offset = start;

	path->leave_spinning = 1;
	if (merge) {
		struct btrfs_file_extent_item *fi;
		u64 extent_len;
@@ -2368,6 +2369,7 @@ static noinline int relink_extent_backref(struct btrfs_path *path,

	btrfs_mark_buffer_dirty(leaf);
	inode_add_bytes(inode, len);
	btrfs_release_path(path);

	ret = btrfs_inc_extent_ref(trans, root, new->bytenr,
			new->disk_len, 0,
@@ -2381,6 +2383,7 @@ static noinline int relink_extent_backref(struct btrfs_path *path,
	ret = 1;
out_free_path:
	btrfs_release_path(path);
	path->leave_spinning = 0;
	btrfs_end_transaction(trans, root);
out_unlock:
	unlock_extent_cached(&BTRFS_I(inode)->io_tree, lock_start, lock_end,