Btrfs: dirindex optimizations

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

1 files changed, 5 insertions, 1 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index de9ee3aa0aad..5230554380d1 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -311,6 +311,7 @@ struct btrfs_root *open_ctree(struct super_block *sb)
         fs_info->extent_root = extent_root;
         fs_info->inode_root = inode_root;
         fs_info->last_inode_alloc = 0;
+        fs_info->highest_inode = 0;
         fs_info->sb = sb;
         fs_info->btree_inode = new_inode(sb);
         fs_info->btree_inode->i_ino = 1;
@@ -360,12 +361,15 @@ printk("failed2\n");
 
         ret = find_and_setup_root(sb->s_blocksize, tree_root, fs_info,
                                   BTRFS_FS_TREE_OBJECTID, root);
-        mutex_unlock(&fs_info->fs_mutex);
         BUG_ON(ret);
         root->commit_root = root->node;
         get_bh(root->node);
         root->ref_cows = 1;
         root->fs_info->generation = root->root_key.offset + 1;
+        ret = btrfs_find_highest_inode(root, &root->fs_info->last_inode_alloc);
+        if (ret == 0)
+                fs_info->highest_inode = fs_info->last_inode_alloc;
+        mutex_unlock(&fs_info->fs_mutex);
         return root;
 }