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Message-ID: <tip-6d55da53db3d9b911f69f2ce1e5fb8943eafe057@git.kernel.org>
Date: Sat, 12 Mar 2011 10:59:02 GMT
From: tip-bot for Lai Jiangshan <laijs@...fujitsu.com>
To: linux-tip-commits@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
rostedt@...dmis.org, tglx@...utronix.de, laijs@...fujitsu.com
Subject: [tip:core/futexes] plist: Add priority list test
Commit-ID: 6d55da53db3d9b911f69f2ce1e5fb8943eafe057
Gitweb: http://git.kernel.org/tip/6d55da53db3d9b911f69f2ce1e5fb8943eafe057
Author: Lai Jiangshan <laijs@...fujitsu.com>
AuthorDate: Tue, 21 Dec 2010 17:55:18 +0800
Committer: Steven Rostedt <rostedt@...dmis.org>
CommitDate: Fri, 11 Mar 2011 15:14:48 -0500
plist: Add priority list test
Add test code for checking plist when the kernel is booting.
Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
LKML-Reference: <4D107986.1010302@...fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
---
lib/plist.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 80 insertions(+), 1 deletions(-)
diff --git a/lib/plist.c b/lib/plist.c
index 8c614d0..0ae7e64 100644
--- a/lib/plist.c
+++ b/lib/plist.c
@@ -28,6 +28,8 @@
#ifdef CONFIG_DEBUG_PI_LIST
+static struct plist_head test_head;
+
static void plist_check_prev_next(struct list_head *t, struct list_head *p,
struct list_head *n)
{
@@ -54,7 +56,7 @@ static void plist_check_list(struct list_head *top)
static void plist_check_head(struct plist_head *head)
{
- WARN_ON(!head->rawlock && !head->spinlock);
+ WARN_ON(head != &test_head && !head->rawlock && !head->spinlock);
if (head->rawlock)
WARN_ON_SMP(!raw_spin_is_locked(head->rawlock));
if (head->spinlock)
@@ -135,3 +137,80 @@ void plist_del(struct plist_node *node, struct plist_head *head)
plist_check_head(head);
}
+
+#ifdef CONFIG_DEBUG_PI_LIST
+#include <linux/sched.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+static struct plist_node __initdata test_node[241];
+
+static void __init plist_test_check(int nr_expect)
+{
+ struct plist_node *first, *prio_pos, *node_pos;
+
+ if (plist_head_empty(&test_head)) {
+ BUG_ON(nr_expect != 0);
+ return;
+ }
+
+ prio_pos = first = plist_first(&test_head);
+ plist_for_each(node_pos, &test_head) {
+ if (nr_expect-- < 0)
+ break;
+ if (node_pos == first)
+ continue;
+ if (node_pos->prio == prio_pos->prio) {
+ BUG_ON(!list_empty(&node_pos->prio_list));
+ continue;
+ }
+
+ BUG_ON(prio_pos->prio > node_pos->prio);
+ BUG_ON(prio_pos->prio_list.next != &node_pos->prio_list);
+ prio_pos = node_pos;
+ }
+
+ BUG_ON(nr_expect != 0);
+ BUG_ON(prio_pos->prio_list.next != &first->prio_list);
+}
+
+static int __init plist_test(void)
+{
+ int nr_expect = 0, i, loop;
+ unsigned int r = local_clock();
+
+ printk(KERN_INFO "start plist test\n");
+ plist_head_init(&test_head, NULL);
+ for (i = 0; i < ARRAY_SIZE(test_node); i++)
+ plist_node_init(test_node + i, 0);
+
+ for (loop = 0; loop < 1000; loop++) {
+ r = r * 193939 % 47629;
+ i = r % ARRAY_SIZE(test_node);
+ if (plist_node_empty(test_node + i)) {
+ r = r * 193939 % 47629;
+ test_node[i].prio = r % 99;
+ plist_add(test_node + i, &test_head);
+ nr_expect++;
+ } else {
+ plist_del(test_node + i, &test_head);
+ nr_expect--;
+ }
+ plist_test_check(nr_expect);
+ }
+
+ for (i = 0; i < ARRAY_SIZE(test_node); i++) {
+ if (plist_node_empty(test_node + i))
+ continue;
+ plist_del(test_node + i, &test_head);
+ nr_expect--;
+ plist_test_check(nr_expect);
+ }
+
+ printk(KERN_INFO "end plist test\n");
+ return 0;
+}
+
+module_init(plist_test);
+
+#endif
--
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