.

bigfile/virtmem.c

@@ -569,8 +569,6 @@ void fileh_invalidate_page(BigFileH *fileh, pgoff_t pgoffset)
         /* else we just make sure to drop page memory */
         else {
             page_drop_memory(page);
-            // XXX + page_del       ?
-            // XXX + pagemap_del    ?
         }
     }
 
@@ -1001,7 +999,9 @@ void *page_mmap(Page *page, void *addr, int prot)
 }
 
 
-// XXX -> page_drop = drop memory, delete page from pagemap, delete page
+/* page_drop_memory frees RAM associated with page and transition page state into PAGE_EMPTY.
+ *
+ * The Page struct itself is not released - see page_del for that. */
 static void page_drop_memory(Page *page)
 {
     /* Memory for this page goes out. 1) unmap it from all mmaps */