swapping01.c: Add git tag, docparse, SPDX
Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
diff --git a/testcases/kernel/mem/swapping/swapping01.c b/testcases/kernel/mem/swapping/swapping01.c
index 498f502..6db0f98 100644
--- a/testcases/kernel/mem/swapping/swapping01.c
+++ b/testcases/kernel/mem/swapping/swapping01.c
@@ -1,27 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2012-2017 Red Hat, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU General Public License for more details.
*/
-/*
- * swapping01 - first time swap use results in heavy swapping
+
+/*\
+ * [Description]
*
- * This case is used for testing upstream commit: 50a1598
+ * Detect heavy swapping during first time swap use.
+ *
+ * This case is used for testing kernel commit:
+ * 50a15981a1fa ("[S390] reference bit testing for unmapped pages")
*
* The upstream commit fixed a issue on s390/x platform that heavy
* swapping might occur in some condition, however since the patch
* was quite general, this testcase will be run on all supported
* platforms to ensure no regression been introduced.
*
- * Details of the upstream fix:
+ * Details of the kernel fix:
+ *
* On x86 a page without a mapper is by definition not referenced / old.
* The s390 architecture keeps the reference bit in the storage key and
* the current code will check the storage key for page without a mapper.
@@ -31,11 +27,12 @@
* To avoid this behaviour change page_referenced to query the storage
* key only if there is a mapper of the page.
*
- * Test Strategy:
+ * [Algorithm]
+ *
* Try to allocate memory which size is slightly larger than current
* available memory. After allocation done, continue loop for a while
* and calculate the used swap size. The used swap size should be small
- * enough, else it indicates that heavy swapping is occured unexpectedly.
+ * enough, else it indicates that heavy swapping is occurred unexpectedly.
*/
#include <sys/types.h>
@@ -166,4 +163,8 @@
.needs_root = 1,
.forks_child = 1,
.test_all = test_swapping,
+ .tags = (const struct tst_tag[]) {
+ {"linux-git", "50a15981a1fa"},
+ {}
+ }
};
