@@ -967,8 +967,9 @@ _bt_page_recyclable(Page page)
967967 * non-leaf page has to be done as part of an atomic action that includes
968968 * deleting the page it points to.
969969 *
970- * This routine assumes that the caller has pinned and locked the buffer.
971- * Also, the given deletable array *must* be sorted in ascending order.
970+ * This routine assumes that the caller has a super-exclusive write lock on
971+ * the buffer. Also, the given deletable array *must* be sorted in ascending
972+ * order.
972973 *
973974 * We record VACUUMs and b-tree deletes differently in WAL. Deletes must
974975 * generate recovery conflicts by accessing the heap inline, whereas VACUUMs
@@ -1049,8 +1050,9 @@ _bt_delitems_vacuum(Relation rel, Buffer buf,
10491050 *
10501051 * As above, must only be used on leaf pages.
10511052 *
1052- * This routine assumes that the caller has pinned and locked the buffer.
1053- * Also, the given itemnos *must* appear in increasing order in the array.
1053+ * This routine assumes that the caller has pinned and write locked the
1054+ * buffer. Also, the given itemnos *must* appear in increasing order in the
1055+ * array.
10541056 *
10551057 * This is nearly the same as _bt_delitems_vacuum as far as what it does to
10561058 * the page, but it needs to generate its own recovery conflicts by accessing