diff --git a/doc/todo/info_show_total_annex_sizes_of_repositories.mdwn b/doc/todo/info_show_total_annex_sizes_of_repositories.mdwn
index 59a95c8ff7..ce48edc537 100644
--- a/doc/todo/info_show_total_annex_sizes_of_repositories.mdwn
+++ b/doc/todo/info_show_total_annex_sizes_of_repositories.mdwn
@@ -1,4 +1,8 @@
 `git-annex info` when run with a path displays "repositories containing these files"
 with a list of repositories and sizes. It would be good for it, when not
 run with a path to display a corresponding "annex size of repositories".
+
+I think that this recently became possible to inplement cheaply.
+cachedAllRepoData is collected now, used for "combined annex size of all repositories".
+For this, it also needs to accumulate the size of each separate repository.
 --[[Joey]]