PERFORCE change 94259 for review

[John Baldwin]

http://perforce.freebsd.org/chv.cgi?CH=94259

Change 94259 by jhb at jhb_slimer on 2006/03/29 21:31:05

	Add a test case for sleeping while holding a mutex.

Affected files ...

.. //depot/projects/smpng/sys/modules/crash2/crash2.c#3 edit

Differences ...

==== //depot/projects/smpng/sys/modules/crash2/crash2.c#3 (text+ko) ====

@@ -85,6 +85,7 @@
 static struct proc *kthread[NTHREADS];
 static int event[NTHREADS];
 static struct rwlock foo;
+static struct mtx bar;
 
 static int	mod_event(struct module *module, int cmd, void *arg);
 static int	load(void *arg);
@@ -95,6 +96,16 @@
 /* Events. */
 
 static void
+bar_sleep(void)
+{
+
+	mtx_lock(&bar);
+	tsleep(&bar, curthread->td_priority, "bar", hz/100);
+	mtx_unlock(&bar);
+}
+CRASH2_EVENT("sleep holding bar", bar_sleep, bar_sleep, bar_sleep, bar_sleep);
+
+static void
 whack_foo(void)
 {
 	switch (arc4random() % 10) {
@@ -255,6 +266,7 @@
 	int error, i;
 
 	rw_init(&foo, "foo");
+	mtx_init(&bar, "bar", NULL, MTX_DEF);
 	mtx_init(&event_mtx, "crash2 event", NULL, MTX_DEF);
 	cv_init(&event_cv, "crash2");
 	for (i = 0; i < NTHREADS;  i++) {