Btrfs: Disable btree reada during extent backref lookups.

This reada is generally not effective.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 68137cd8506a..660b05a4baf5 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -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,