Add explanatory comments to vm tests.

[pintos-anon] / src / tests / vm / child-sort.c

diff --git a/src/tests/vm/child-sort.c b/src/tests/vm/child-sort.c
index 638a66de2a190192955364e2cbeba2675df9b1d7..d755432cbd6dde76a2a34754bce422c3dafcb3d9 100644 (file)
--- a/src/tests/vm/child-sort.c
+++ b/src/tests/vm/child-sort.c
@@ -1,3 +1,7 @@
+/* Reads a 128 kB file and "sorts" the bytes in it, using
+   counting sort.  The sorted data is written back to the same
+   file in-place. */
+
 #include <debug.h>
 #include <syscall.h>
 #include "tests/lib.h"