lockstat: measure lock bouncing

[firefly-linux-kernel-4.4.55.git] / include / linux / lockdep.h

diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 3d3386b88b6aeb043f3bca3f49a75eb3f62e5c43..0e843bf658777114a3a664e1c978588ee623cc3f 100644 (file)
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -130,12 +130,24 @@ struct lock_time {
        unsigned long                   nr;
 };
 
+enum bounce_type {
+       bounce_acquired_write,
+       bounce_acquired_read,
+       bounce_contended_write,
+       bounce_contended_read,
+       nr_bounce_types,
+
+       bounce_acquired = bounce_acquired_write,
+       bounce_contended = bounce_contended_write,
+};
+
 struct lock_class_stats {
        unsigned long                   contention_point[4];
        struct lock_time                read_waittime;
        struct lock_time                write_waittime;
        struct lock_time                read_holdtime;
        struct lock_time                write_holdtime;
+       unsigned long                   bounces[nr_bounce_types];
 };
 
 struct lock_class_stats lock_stats(struct lock_class *class);
@@ -150,6 +162,9 @@ struct lockdep_map {
        struct lock_class_key           *key;
        struct lock_class               *class_cache;
        const char                      *name;
+#ifdef CONFIG_LOCK_STAT
+       int                             cpu;
+#endif
 };
 
 /*
@@ -321,8 +336,8 @@ do {                                                                \
        if (!try(_lock)) {                                      \
                lock_contended(&(_lock)->dep_map, _RET_IP_);    \
                lock(_lock);                                    \
-               lock_acquired(&(_lock)->dep_map);               \
        }                                                       \
+       lock_acquired(&(_lock)->dep_map);                       \
 } while (0)
 
 #else /* CONFIG_LOCK_STAT */