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-rw-r--r--fs/btrfs/tree-log.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 332ec35d2c0..d81cda2e077 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -158,6 +158,19 @@ static int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
*/
new_root->ref_cows = 0;
new_root->last_trans = trans->transid;
+
+ /*
+ * we need to make sure the root block for this new tree
+ * is marked as dirty in the dirty_log_pages tree. This
+ * is how it gets flushed down to disk at tree log commit time.
+ *
+ * the tree logging mutex keeps others from coming in and changing
+ * the new_root->node, so we can safely access it here
+ */
+ set_extent_dirty(&new_root->dirty_log_pages, new_root->node->start,
+ new_root->node->start + new_root->node->len - 1,
+ GFP_NOFS);
+
fail:
return ret;
}