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Commit b0331a4c authored by Chris Mason's avatar Chris Mason
Browse files

Btrfs: Disable btree reada during extent backref lookups. 



This reada is generally not effective.

Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent e2008b61

fs/btrfs/extent-tree.c

+4 −0
Original line number Diff line number Diff line
@@ -630,6 +630,7 @@ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 
	if (!path)

		return -ENOMEM;



	path->reada = 0;

	key.objectid = bytenr;

	btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY);

	key.offset = num_bytes;
@@ -649,6 +650,7 @@ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 


	btrfs_release_path(root->fs_info->extent_root, path);



	path->reada = 0;

	ret = btrfs_insert_extent_backref(trans, root->fs_info->extent_root,

					  path, bytenr, root_objectid,

					  ref_generation, owner, owner_offset);
@@ -680,6 +682,7 @@ static int lookup_extent_ref(struct btrfs_trans_handle *trans, 


	WARN_ON(num_bytes < root->sectorsize);

	path = btrfs_alloc_path();

	path->reada = 0;

	key.objectid = bytenr;

	key.offset = num_bytes;

	btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY);
@@ -1240,6 +1243,7 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root 
	if (!path)

		return -ENOMEM;



	path->reada = 0;

	ret = lookup_extent_backref(trans, extent_root, path,

				    bytenr, root_objectid,

				    ref_generation,