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authorThomas Gleixner <tglx@linutronix.de>2006-06-27 02:54:56 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-27 17:32:47 -0700
commit61a87122869b6340a63b6f9f84097d3688604b90 (patch)
tree11d60d29763a42abd66453a920cc06bebc852427 /kernel/rtmutex_common.h
parente7eebaf6a81b956c989f184ee4b27277c88f8afe (diff)
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[PATCH] pi-futex: rt mutex tester
RT-mutex tester: scriptable tester for rt mutexes, which allows userspace scripting of mutex unit-tests (and dynamic tests as well), using the actual rt-mutex implementation of the kernel. [akpm@osdl.org: fixlet] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/rtmutex_common.h')
-rw-r--r--kernel/rtmutex_common.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/kernel/rtmutex_common.h b/kernel/rtmutex_common.h
index 50eed60..e068024 100644
--- a/kernel/rtmutex_common.h
+++ b/kernel/rtmutex_common.h
@@ -15,6 +15,28 @@
#include <linux/rtmutex.h>
/*
+ * The rtmutex in kernel tester is independent of rtmutex debugging. We
+ * call schedule_rt_mutex_test() instead of schedule() for the tasks which
+ * belong to the tester. That way we can delay the wakeup path of those
+ * threads to provoke lock stealing and testing of complex boosting scenarios.
+ */
+#ifdef CONFIG_RT_MUTEX_TESTER
+
+extern void schedule_rt_mutex_test(struct rt_mutex *lock);
+
+#define schedule_rt_mutex(_lock) \
+ do { \
+ if (!(current->flags & PF_MUTEX_TESTER)) \
+ schedule(); \
+ else \
+ schedule_rt_mutex_test(_lock); \
+ } while (0)
+
+#else
+# define schedule_rt_mutex(_lock) schedule()
+#endif
+
+/*
* This is the control structure for tasks blocked on a rt_mutex,
* which is allocated on the kernel stack on of the blocked task.
*
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