diff --git a/man2/mount_setattr.2 b/man2/mount_setattr.2
index 07c12e3f8..196e98242 100644
--- a/man2/mount_setattr.2
+++ b/man2/mount_setattr.2
@@ -981,6 +981,18 @@ main(int argc, char *argv[])
 
     /* In the following, \-1 as the \(aqdirfd\(aq argument ensures that
        open_tree() fails if \(aqsource\(aq is not an absolute pathname. */
+.\" Christian Brauner
+.\"     When writing programs I like to never use relative paths with AT_FDCWD
+.\"     because. Because making assumptions about the current working directory
+.\"     of the calling process is just too easy to get wrong; especially when
+.\"     pivot_root() or chroot() are in play.
+.\"     My absolut preference (joke intended) is to open a well-known starting
+.\"     point with an absolute path to get a dirfd and then scope all future
+.\"     operations beneath that dirfd. This already works with old-style
+.\"     openat() and _very_ cautious programming but openat2() and its
+.\"     resolve-flag space have made this **chef's kiss**.
+.\"     If I can't operate based on a well-known dirfd I use absolute paths
+.\"     with a -EBADF dirfd passed to *at() functions.
 
     int fd_tree = open_tree(\-1, source,
                        OPEN_TREE_CLONE | OPEN_TREE_CLOEXEC |