Add explanatory comments to vm tests.

[pintos-anon] / src / tests / vm / mmap-clean.c

diff --git a/src/tests/vm/mmap-clean.c b/src/tests/vm/mmap-clean.c
index c01f69cf3cb75aca8bf1b56fba6d9d3b17d19273..ea1dc9cb09ba54c795ee298c03eca32cfce4928c 100644 (file)
--- a/src/tests/vm/mmap-clean.c
+++ b/src/tests/vm/mmap-clean.c
@@ -1,3 +1,6 @@
+/* Verifies that mmap'd regions are only written back on munmap
+   if the data was actually modified in memory. */
+
 #include <string.h>
 #include <syscall.h>
 #include "tests/vm/sample.inc"