Btrfs: Disable btree reada during extent backref lookups.
This reada is generally not effective.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 68137cd..660b05a 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -630,6 +630,7 @@
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 @@
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 @@
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 @@
if (!path)
return -ENOMEM;
+ path->reada = 0;
ret = lookup_extent_backref(trans, extent_root, path,
bytenr, root_objectid,
ref_generation,