* [PATCH 2/5] lock stat kills lock meter for -rt
2006-12-14 13:35 [PATCH 0/5] lock stat kills lock meter for -rt Bill Huey
@ 2006-12-14 13:39 ` Bill Huey
0 siblings, 0 replies; 2+ messages in thread
From: Bill Huey @ 2006-12-14 13:39 UTC (permalink / raw)
To: Ingo Molnar
Cc: Steven Rostedt, Thomas Gleixner, linux-kernel, Bill Huey (hui)
[-- Attachment #1: Type: text/plain, Size: 51 bytes --]
.c files that have been changed, rtmutex.c, rt.c
[-- Attachment #2: cfiles.diff --]
[-- Type: text/plain, Size: 26311 bytes --]
============================================================
--- kernel/rt.c 5fc97ed10d5053f52488dddfefdb92e6aee2b148
+++ kernel/rt.c 3b86109e8e4163223f17c7d13a5bf53df0e04d70
@@ -66,6 +66,7 @@
#include <linux/plist.h>
#include <linux/fs.h>
#include <linux/futex.h>
+#include <linux/lock_stat.h>
#include "rtmutex_common.h"
@@ -75,6 +76,42 @@
# include "rtmutex.h"
#endif
+#ifdef CONFIG_LOCK_STAT
+#define __LOCK_STAT_RT_MUTEX_LOCK(a) \
+ rt_mutex_lock_with_ip(a, \
+ (unsigned long) __builtin_return_address(0))
+#else
+#define __LOCK_STAT_RT_MUTEX_LOCK(a) \
+ rt_mutex_lock(a);
+#endif
+
+#ifdef CONFIG_LOCK_STAT
+#define __LOCK_STAT_RT_MUTEX_LOCK_INTERRUPTIBLE(a, b) \
+ rt_mutex_lock_interruptible_with_ip(a, b, \
+ (unsigned long) __builtin_return_address(0))
+#else
+#define __LOCK_STAT_RT_MUTEX_LOCK_INTERRUPTIBLE(a) \
+ rt_mutex_lock_interruptible(a, b);
+#endif
+
+#ifdef CONFIG_LOCK_STAT
+#define __LOCK_STAT_RT_MUTEX_TRYLOCK(a) \
+ rt_mutex_trylock_with_ip(a, \
+ (unsigned long) __builtin_return_address(0))
+#else
+#define __LOCK_STAT_RT_MUTEX_TRYLOCK(a) \
+ rt_mutex_trylock(a);
+#endif
+
+#ifdef CONFIG_LOCK_STAT
+#define __LOCK_STAT_RT_SPIN_LOCK(a) \
+ __rt_spin_lock_with_ip(a, \
+ (unsigned long) __builtin_return_address(0))
+#else
+#define __LOCK_STAT_RT_SPIN_LOCK(a) \
+ __rt_spin_lock(a);
+#endif
+
#ifdef CONFIG_PREEMPT_RT
/*
* Unlock these on crash:
@@ -88,7 +125,8 @@ void zap_rt_locks(void)
/*
* struct mutex functions
*/
-void _mutex_init(struct mutex *lock, char *name, struct lock_class_key *key)
+void _mutex_init(struct mutex *lock, char *name, struct lock_class_key *key
+ __COMMA_LOCK_STAT_NOTE_PARAM_DECL)
{
#ifdef CONFIG_DEBUG_LOCK_ALLOC
/*
@@ -97,14 +135,15 @@ void _mutex_init(struct mutex *lock, cha
debug_check_no_locks_freed((void *)lock, sizeof(*lock));
lockdep_init_map(&lock->dep_map, name, key, 0);
#endif
- __rt_mutex_init(&lock->lock, name);
+ __rt_mutex_init(&lock->lock, name __COMMA_LOCK_STAT_NOTE_VARS);
}
EXPORT_SYMBOL(_mutex_init);
void __lockfunc _mutex_lock(struct mutex *lock)
{
mutex_acquire(&lock->dep_map, 0, 0, _RET_IP_);
- rt_mutex_lock(&lock->lock);
+
+ __LOCK_STAT_RT_MUTEX_LOCK(&lock->lock);
}
EXPORT_SYMBOL(_mutex_lock);
@@ -124,14 +163,14 @@ void __lockfunc _mutex_lock_nested(struc
void __lockfunc _mutex_lock_nested(struct mutex *lock, int subclass)
{
mutex_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
- rt_mutex_lock(&lock->lock);
+ __LOCK_STAT_RT_MUTEX_LOCK(&lock->lock);
}
EXPORT_SYMBOL(_mutex_lock_nested);
#endif
int __lockfunc _mutex_trylock(struct mutex *lock)
{
- int ret = rt_mutex_trylock(&lock->lock);
+ int ret = __LOCK_STAT_RT_MUTEX_TRYLOCK(&lock->lock);
if (ret)
mutex_acquire(&lock->dep_map, 0, 1, _RET_IP_);
@@ -152,7 +191,7 @@ int __lockfunc rt_write_trylock(rwlock_t
*/
int __lockfunc rt_write_trylock(rwlock_t *rwlock)
{
- int ret = rt_mutex_trylock(&rwlock->lock);
+ int ret = __LOCK_STAT_RT_MUTEX_TRYLOCK(&rwlock->lock);
if (ret)
rwlock_acquire(&rwlock->dep_map, 0, 1, _RET_IP_);
@@ -179,7 +218,7 @@ int __lockfunc rt_read_trylock(rwlock_t
}
spin_unlock_irqrestore(&lock->wait_lock, flags);
- ret = rt_mutex_trylock(lock);
+ ret = __LOCK_STAT_RT_MUTEX_TRYLOCK(lock);
if (ret)
rwlock_acquire_read(&rwlock->dep_map, 0, 1, _RET_IP_);
@@ -190,7 +229,7 @@ void __lockfunc rt_write_lock(rwlock_t *
void __lockfunc rt_write_lock(rwlock_t *rwlock)
{
rwlock_acquire(&rwlock->dep_map, 0, 0, _RET_IP_);
- __rt_spin_lock(&rwlock->lock);
+ __LOCK_STAT_RT_SPIN_LOCK(&rwlock->lock);
}
EXPORT_SYMBOL(rt_write_lock);
@@ -210,11 +249,44 @@ void __lockfunc rt_read_lock(rwlock_t *r
return;
}
spin_unlock_irqrestore(&lock->wait_lock, flags);
- __rt_spin_lock(lock);
+ __LOCK_STAT_RT_SPIN_LOCK(lock);
}
EXPORT_SYMBOL(rt_read_lock);
+#ifdef CONFIG_LOCK_STAT
+void __lockfunc rt_write_lock_with_ip(rwlock_t *rwlock, unsigned long ip)
+{
+ rwlock_acquire(&rwlock->dep_map, 0, 0, ip);
+ __rt_spin_lock_with_ip(&rwlock->lock, ip);
+}
+EXPORT_SYMBOL(rt_write_lock_with_ip);
+
+void __lockfunc rt_read_lock_with_ip(rwlock_t *rwlock, unsigned long ip)
+{
+ unsigned long flags;
+ struct rt_mutex *lock = &rwlock->lock;
+
+ /*
+ * NOTE: we handle it as a write-lock:
+ */
+ rwlock_acquire(&rwlock->dep_map, 0, 0, ip);
+ /*
+ * Read locks within the write lock succeed.
+ */
+ spin_lock_irqsave(&lock->wait_lock, flags);
+ if (rt_mutex_real_owner(lock) == current) {
+ spin_unlock_irqrestore(&lock->wait_lock, flags);
+ rwlock->read_depth++;
+ return;
+ }
+ spin_unlock_irqrestore(&lock->wait_lock, flags);
+ __rt_spin_lock_with_ip(lock, ip);
+}
+
+EXPORT_SYMBOL(rt_read_lock_with_ip);
+#endif
+
void __lockfunc rt_write_unlock(rwlock_t *rwlock)
{
/* NOTE: we always pass in '1' for nested, for simplicity */
@@ -246,7 +318,12 @@ unsigned long __lockfunc rt_write_lock_i
unsigned long __lockfunc rt_write_lock_irqsave(rwlock_t *rwlock)
{
+#ifdef CONFIG_LOCK_STAT
+ rt_write_lock_with_ip(rwlock,
+ (unsigned long) __builtin_return_address(0));
+#else
rt_write_lock(rwlock);
+#endif
return 0;
}
@@ -254,13 +331,19 @@ unsigned long __lockfunc rt_read_lock_ir
unsigned long __lockfunc rt_read_lock_irqsave(rwlock_t *rwlock)
{
+#ifdef CONFIG_LOCK_STAT
+ rt_read_lock_with_ip(rwlock,
+ (unsigned long) __builtin_return_address(0));
+#else
rt_read_lock(rwlock);
+#endif
return 0;
}
EXPORT_SYMBOL(rt_read_lock_irqsave);
-void __rt_rwlock_init(rwlock_t *rwlock, char *name, struct lock_class_key *key)
+void __rt_rwlock_init(rwlock_t *rwlock, char *name, struct lock_class_key *key
+ __COMMA_LOCK_STAT_NOTE_PARAM_DECL)
{
#ifdef CONFIG_DEBUG_LOCK_ALLOC
/*
@@ -269,11 +352,30 @@ void __rt_rwlock_init(rwlock_t *rwlock,
debug_check_no_locks_freed((void *)rwlock, sizeof(*rwlock));
lockdep_init_map(&rwlock->dep_map, name, key, 0);
#endif
- __rt_mutex_init(&rwlock->lock, name);
+ __rt_mutex_init(&rwlock->lock, name __COMMA_LOCK_STAT_NOTE_VARS);
rwlock->read_depth = 0;
}
EXPORT_SYMBOL(__rt_rwlock_init);
+#ifdef CONFIG_LOCK_STAT
+void __rt_rwlock_init_annotated(rwlock_t *rwlock, char *name,
+ struct lock_class_key *key,
+ LOCK_STAT_NOTE_PARAM_DECL,
+ struct lock_stat *lsobject)
+{
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+ /*
+ * Make sure we are not reinitializing a held lock:
+ */
+ debug_check_no_locks_freed((void *)rwlock, sizeof(*rwlock));
+ lockdep_init_map(&rwlock->dep_map, name, key, 0);
+#endif
+ __rt_mutex_init_annotated(&rwlock->lock, name, LOCK_STAT_NOTE_VARS, lsobject);
+ rwlock->read_depth = 0;
+}
+EXPORT_SYMBOL(__rt_rwlock_init_annotated);
+#endif
+
/*
* rw_semaphores
*/
@@ -335,7 +437,7 @@ int fastcall rt_down_write_trylock(struc
int fastcall rt_down_write_trylock(struct rw_semaphore *rwsem)
{
- int ret = rt_mutex_trylock(&rwsem->lock);
+ int ret = __LOCK_STAT_RT_MUTEX_TRYLOCK(&rwsem->lock);
if (ret)
rwsem_acquire(&rwsem->dep_map, 0, 1, _RET_IP_);
@@ -346,14 +448,14 @@ void fastcall rt_down_write(struct rw_se
void fastcall rt_down_write(struct rw_semaphore *rwsem)
{
rwsem_acquire(&rwsem->dep_map, 0, 0, _RET_IP_);
- rt_mutex_lock(&rwsem->lock);
+ __LOCK_STAT_RT_MUTEX_LOCK(&rwsem->lock);
}
EXPORT_SYMBOL(rt_down_write);
void fastcall rt_down_write_nested(struct rw_semaphore *rwsem, int subclass)
{
rwsem_acquire(&rwsem->dep_map, subclass, 0, _RET_IP_);
- rt_mutex_lock(&rwsem->lock);
+ __LOCK_STAT_RT_MUTEX_LOCK(&rwsem->lock);
}
EXPORT_SYMBOL(rt_down_write_nested);
@@ -374,7 +476,7 @@ int fastcall rt_down_read_trylock(struct
}
spin_unlock_irqrestore(&rwsem->lock.wait_lock, flags);
- ret = rt_mutex_trylock(&rwsem->lock);
+ ret = __LOCK_STAT_RT_MUTEX_TRYLOCK(&rwsem->lock);
if (ret)
rwsem_acquire(&rwsem->dep_map, 0, 1, _RET_IP_);
return ret;
@@ -398,7 +500,7 @@ static void __rt_down_read(struct rw_sem
return;
}
spin_unlock_irqrestore(&rwsem->lock.wait_lock, flags);
- rt_mutex_lock(&rwsem->lock);
+ __LOCK_STAT_RT_MUTEX_LOCK(&rwsem->lock);
}
void fastcall rt_down_read(struct rw_semaphore *rwsem)
@@ -433,14 +535,15 @@ void fastcall rt_down_read_non_owner(str
return;
}
spin_unlock_irqrestore(&rwsem->lock.wait_lock, flags);
- rt_mutex_lock(&rwsem->lock);
+ __LOCK_STAT_RT_MUTEX_LOCK(&rwsem->lock);
}
EXPORT_SYMBOL(rt_down_read_non_owner);
#endif
void fastcall __rt_rwsem_init(struct rw_semaphore *rwsem, char *name,
- struct lock_class_key *key)
+ struct lock_class_key *key
+ __COMMA_LOCK_STAT_NOTE_PARAM_DECL)
{
#ifdef CONFIG_DEBUG_LOCK_ALLOC
/*
@@ -449,7 +552,7 @@ void fastcall __rt_rwsem_init(struct rw_
debug_check_no_locks_freed((void *)rwsem, sizeof(*rwsem));
lockdep_init_map(&rwsem->dep_map, name, key, 0);
#endif
- __rt_mutex_init(&rwsem->lock, name);
+ __rt_mutex_init(&rwsem->lock, name __COMMA_LOCK_STAT_NOTE_VARS);
rwsem->read_depth = 0;
}
EXPORT_SYMBOL(__rt_rwsem_init);
@@ -478,7 +581,7 @@ void fastcall rt_down(struct semaphore *
void fastcall rt_down(struct semaphore *sem)
{
- rt_mutex_lock(&sem->lock);
+ __LOCK_STAT_RT_MUTEX_LOCK(&sem->lock);
__down_complete(sem);
}
EXPORT_SYMBOL(rt_down);
@@ -487,7 +590,7 @@ int fastcall rt_down_interruptible(struc
{
int ret;
- ret = rt_mutex_lock_interruptible(&sem->lock, 0);
+ ret = __LOCK_STAT_RT_MUTEX_LOCK_INTERRUPTIBLE(&sem->lock, 0);
if (ret)
return ret;
__down_complete(sem);
@@ -507,7 +610,7 @@ int fastcall rt_down_trylock(struct sema
* embedded mutex internally. It would be quite complex to remove
* these transient failures so lets try it the simple way first:
*/
- if (rt_mutex_trylock(&sem->lock)) {
+ if (__LOCK_STAT_RT_MUTEX_TRYLOCK(&sem->lock)) {
__down_complete(sem);
return 0;
}
@@ -534,26 +637,26 @@ EXPORT_SYMBOL(rt_up);
}
EXPORT_SYMBOL(rt_up);
-void fastcall __sema_init(struct semaphore *sem, int val,
- char *name, char *file, int line)
+void fastcall __sema_init(struct semaphore *sem, int val, char *name
+ __COMMA_LOCK_STAT_FN_DECL, char *_file, int _line)
{
atomic_set(&sem->count, val);
switch (val) {
case 0:
- __rt_mutex_init(&sem->lock, name);
- rt_mutex_lock(&sem->lock);
+ __rt_mutex_init(&sem->lock, name __COMMA_LOCK_STAT_NOTE_VARS);
+ rt_mutex_lock_with_ip(&sem->lock, (unsigned long) __builtin_return_address(0));
break;
default:
- __rt_mutex_init(&sem->lock, name);
+ __rt_mutex_init(&sem->lock, name __COMMA_LOCK_STAT_NOTE_VARS);
break;
}
}
EXPORT_SYMBOL(__sema_init);
-void fastcall __init_MUTEX(struct semaphore *sem, char *name, char *file,
- int line)
+void fastcall __init_MUTEX(struct semaphore *sem, char *name
+ __COMMA_LOCK_STAT_FN_DECL, char *_file, int _line)
{
- __sema_init(sem, 1, name, file, line);
+ __sema_init(sem, 1, name __COMMA_LOCK_STAT_FN_VAR, _file, _line);
}
EXPORT_SYMBOL(__init_MUTEX);
============================================================
--- kernel/rtmutex.c 5fbb6943266e0a2de638851c887e331999eaa16d
+++ kernel/rtmutex.c d9330ea301d8a5df835beefd0f3257d84e70523c
@@ -15,6 +15,10 @@
#include <linux/sched.h>
#include <linux/timer.h>
+#include <linux/hardirq.h>
+#include <linux/interrupt.h>
+#include <linux/lock_stat.h>
+
#include "rtmutex_common.h"
#ifdef CONFIG_DEBUG_RT_MUTEXES
@@ -68,6 +72,11 @@ rt_mutex_set_owner(struct rt_mutex *lock
lock->owner = (struct task_struct *)val;
}
+static inline void rt_mutex_clear_owner(struct rt_mutex *lock)
+{
+ lock->owner = (struct task_struct *) NULL;
+}
+
static inline void clear_rt_mutex_waiters(struct rt_mutex *lock)
{
lock->owner = (struct task_struct *)
@@ -146,6 +155,7 @@ static void __rt_mutex_adjust_prio(struc
if (task->prio != prio)
rt_mutex_setprio(task, prio);
+ /* reschedules task if the priority is lower, holds the run queue lock */
}
/*
@@ -623,12 +633,14 @@ rt_spin_lock_fastlock(struct rt_mutex *l
static inline void
rt_spin_lock_fastlock(struct rt_mutex *lock,
- void fastcall (*slowfn)(struct rt_mutex *lock))
+ void fastcall (*slowfn)(struct rt_mutex *lock
+ __COMMA_LOCK_STAT_IP_DECL)
+ __COMMA_LOCK_STAT_IP_DECL)
{
if (likely(rt_mutex_cmpxchg(lock, NULL, current)))
rt_mutex_deadlock_account_lock(lock, current);
else
- slowfn(lock);
+ slowfn(lock __COMMA_LOCK_STAT_IP);
}
static inline void
@@ -652,10 +664,13 @@ static void fastcall noinline __sched
* sleep/wakeup event loops.
*/
static void fastcall noinline __sched
-rt_spin_lock_slowlock(struct rt_mutex *lock)
+rt_spin_lock_slowlock(struct rt_mutex *lock __COMMA_LOCK_STAT_IP_DECL)
{
struct rt_mutex_waiter waiter;
unsigned long saved_state, state, flags;
+#ifdef CONFIG_LOCK_STAT
+ struct task_struct *owner;
+#endif
debug_rt_mutex_init_waiter(&waiter);
waiter.task = NULL;
@@ -663,6 +678,13 @@ rt_spin_lock_slowlock(struct rt_mutex *l
spin_lock_irqsave(&lock->wait_lock, flags);
init_lists(lock);
+#ifdef CONFIG_LOCK_STAT
+ owner = rt_mutex_owner(lock);
+
+// get_task_struct(owner);
+ lock_stat_note_contention(&lock->lock_stat, owner, _ip);
+// put_task_struct(owner);
+#endif
/* Try to acquire the lock again: */
if (try_to_take_rt_mutex(lock)) {
spin_unlock_irqrestore(&lock->wait_lock, flags);
@@ -775,22 +797,40 @@ void __lockfunc rt_spin_lock(spinlock_t
void __lockfunc rt_spin_lock(spinlock_t *lock)
{
- rt_spin_lock_fastlock(&lock->lock, rt_spin_lock_slowlock);
+ rt_spin_lock_fastlock(&lock->lock, rt_spin_lock_slowlock
+ __COMMA_LOCK_STAT_RET_IP);
spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
}
EXPORT_SYMBOL(rt_spin_lock);
void __lockfunc __rt_spin_lock(struct rt_mutex *lock)
{
- rt_spin_lock_fastlock(lock, rt_spin_lock_slowlock);
+ rt_spin_lock_fastlock(lock, rt_spin_lock_slowlock
+ __COMMA_LOCK_STAT_RET_IP);
}
EXPORT_SYMBOL(__rt_spin_lock);
+#ifdef CONFIG_LOCK_STAT
+void __lockfunc rt_spin_lock_with_ip(spinlock_t *lock, unsigned long _ip)
+{
+ rt_spin_lock_fastlock(&lock->lock, rt_spin_lock_slowlock, _ip);
+ spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
+}
+EXPORT_SYMBOL(rt_spin_lock_with_ip);
+
+void __lockfunc __rt_spin_lock_with_ip(struct rt_mutex *lock, unsigned long _ip)
+{
+ rt_spin_lock_fastlock(lock, rt_spin_lock_slowlock, _ip);
+}
+EXPORT_SYMBOL(__rt_spin_lock_with_ip);
+#endif
+
#ifdef CONFIG_DEBUG_LOCK_ALLOC
void __lockfunc rt_spin_lock_nested(spinlock_t *lock, int subclass)
{
- rt_spin_lock_fastlock(&lock->lock, rt_spin_lock_slowlock);
+ rt_spin_lock_fastlock(&lock->lock, rt_spin_lock_slowlock
+ __COMMA_LOCK_STAT_RET_IP);
spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
}
EXPORT_SYMBOL(rt_spin_lock_nested);
@@ -823,10 +863,20 @@ EXPORT_SYMBOL(rt_spin_unlock_wait);
}
EXPORT_SYMBOL(rt_spin_unlock_wait);
+#if 0
+//#ifdef CONFIG_LOCK_STAT
+#define __RT_MUTEX_TRYLOCK_WITH_IP(a) \
+ rt_mutex_trylock_with_ip(a, (unsigned long) __builtin_return_address(0));
+#else
+#define __RT_MUTEX_TRYLOCK_WITH_IP(a) \
+ rt_mutex_trylock(a);
+#endif
+
int __lockfunc rt_spin_trylock(spinlock_t *lock)
{
- int ret = rt_mutex_trylock(&lock->lock);
+ int ret;
+ ret = __RT_MUTEX_TRYLOCK_WITH_IP(&lock->lock)
if (ret)
spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
@@ -839,7 +889,8 @@ int __lockfunc rt_spin_trylock_irqsave(s
int ret;
*flags = 0;
- ret = rt_mutex_trylock(&lock->lock);
+
+ ret = __RT_MUTEX_TRYLOCK_WITH_IP(&lock->lock)
if (ret)
spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
@@ -852,7 +903,11 @@ int _atomic_dec_and_spin_lock(atomic_t *
/* Subtract 1 from counter unless that drops it to 0 (ie. it was 1) */
if (atomic_add_unless(atomic, -1, 1))
return 0;
+#ifdef CONFIG_LOCK_STAT
+ rt_spin_lock_with_ip(lock, (unsigned long) __builtin_return_address(0));
+#else
rt_spin_lock(lock);
+#endif
if (atomic_dec_and_test(atomic))
return 1;
rt_spin_unlock(lock);
@@ -861,7 +916,8 @@ void
EXPORT_SYMBOL(_atomic_dec_and_spin_lock);
void
-__rt_spin_lock_init(spinlock_t *lock, char *name, struct lock_class_key *key)
+__rt_spin_lock_init(spinlock_t *lock, char *name, struct lock_class_key *key
+ __COMMA_LOCK_STAT_NOTE_PARAM_DECL)
{
#ifdef CONFIG_DEBUG_LOCK_ALLOC
/*
@@ -870,12 +926,31 @@ __rt_spin_lock_init(spinlock_t *lock, ch
debug_check_no_locks_freed((void *)lock, sizeof(*lock));
lockdep_init_map(&lock->dep_map, name, key, 0);
#endif
- __rt_mutex_init(&lock->lock, name);
+ __rt_mutex_init(&lock->lock, name __COMMA_LOCK_STAT_NOTE_VARS);
}
EXPORT_SYMBOL(__rt_spin_lock_init);
+#ifdef CONFIG_LOCK_STAT
+void
+__rt_spin_lock_init_annotated(spinlock_t *lock, char *name,
+ struct lock_class_key *key,
+ LOCK_STAT_NOTE_PARAM_DECL,
+ struct lock_stat *lsobject)
+{
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+ /*
+ * Make sure we are not reinitializing a held lock:
+ */
+ debug_check_no_locks_freed((void *)lock, sizeof(*lock));
+ lockdep_init_map(&lock->dep_map, name, key, 0);
#endif
+ __rt_mutex_init_annotated(&lock->lock, name, LOCK_STAT_NOTE_VARS, lsobject);
+}
+EXPORT_SYMBOL(__rt_spin_lock_init_annotated);
+#endif
+#endif
+
#ifdef CONFIG_PREEMPT_BKL
static inline int rt_release_bkl(struct rt_mutex *lock, unsigned long flags)
@@ -914,11 +989,15 @@ rt_mutex_slowlock(struct rt_mutex *lock,
static int __sched
rt_mutex_slowlock(struct rt_mutex *lock, int state,
struct hrtimer_sleeper *timeout,
- int detect_deadlock)
+ int detect_deadlock
+ __COMMA_LOCK_STAT_IP_DECL)
{
int ret = 0, saved_lock_depth = -1;
struct rt_mutex_waiter waiter;
unsigned long flags;
+#ifdef CONFIG_LOCK_STAT
+ struct task_struct *owner;
+#endif
debug_rt_mutex_init_waiter(&waiter);
waiter.task = NULL;
@@ -926,6 +1005,13 @@ rt_mutex_slowlock(struct rt_mutex *lock,
spin_lock_irqsave(&lock->wait_lock, flags);
init_lists(lock);
+#ifdef CONFIG_LOCK_STAT
+ owner = rt_mutex_owner(lock);
+
+// get_task_struct(owner);
+ lock_stat_note_contention(&lock->lock_stat, owner, _ip);
+// put_task_struct(owner);
+#endif
/* Try to acquire the lock again: */
if (try_to_take_rt_mutex(lock)) {
spin_unlock_irqrestore(&lock->wait_lock, flags);
@@ -937,7 +1023,11 @@ rt_mutex_slowlock(struct rt_mutex *lock,
* possible deadlock in the scheduler.
*/
if (unlikely(current->lock_depth >= 0))
+#ifdef CONFIG_PREEMPT_BKL
saved_lock_depth = rt_release_bkl(lock, flags);
+#else
+ saved_lock_depth = rt_release_bkl(lock);
+#endif
set_current_state(state);
@@ -1040,11 +1130,23 @@ static inline int
* Slow path try-lock function:
*/
static inline int
-rt_mutex_slowtrylock(struct rt_mutex *lock)
+rt_mutex_slowtrylock(struct rt_mutex *lock __COMMA_LOCK_STAT_IP_DECL)
{
unsigned long flags;
int ret = 0;
+#ifdef CONFIG_LOCK_STAT
+ struct task_struct *owner;
+#endif
+ debug_rt_mutex_init_waiter(&waiter);
+
+#ifdef CONFIG_LOCK_STAT
+ owner = rt_mutex_owner(lock);
+
+// get_task_struct(owner);
+ lock_stat_note_contention(&lock->lock_stat, owner, _ip);
+// put_task_struct(owner);
+#endif
spin_lock_irqsave(&lock->wait_lock, flags);
if (likely(rt_mutex_owner(lock) != current)) {
@@ -1057,6 +1159,7 @@ rt_mutex_slowtrylock(struct rt_mutex *lo
* bit unconditionally. Clean this up.
*/
fixup_rt_mutex_waiters(lock);
+
}
spin_unlock_irqrestore(&lock->wait_lock, flags);
@@ -1103,38 +1206,62 @@ rt_mutex_fastlock(struct rt_mutex *lock,
int detect_deadlock,
int (*slowfn)(struct rt_mutex *lock, int state,
struct hrtimer_sleeper *timeout,
- int detect_deadlock))
+ int detect_deadlock __COMMA_LOCK_STAT_IP_DECL)
+ __COMMA_LOCK_STAT_IP_DECL)
{
if (!detect_deadlock && likely(rt_mutex_cmpxchg(lock, NULL, current))) {
rt_mutex_deadlock_account_lock(lock, current);
return 0;
} else
- return slowfn(lock, state, NULL, detect_deadlock);
+ return slowfn(lock, state, NULL, detect_deadlock
+ __COMMA_LOCK_STAT_RET_IP);
}
+#ifdef CONFIG_LOCK_STAT
static inline int
+rt_mutex_fastlock_with_ip(struct rt_mutex *lock, int state,
+ int detect_deadlock,
+ int (*slowfn)(struct rt_mutex *lock, int state,
+ struct hrtimer_sleeper *timeout,
+ int detect_deadlock, unsigned long _ip),
+ unsigned long _ip)
+{
+ if (!detect_deadlock && likely(rt_mutex_cmpxchg(lock, NULL, current))) {
+ rt_mutex_deadlock_account_lock(lock, current);
+ return 0;
+ } else
+ return slowfn(lock, state, NULL, detect_deadlock, _ip);
+}
+#endif
+
+static inline int
rt_mutex_timed_fastlock(struct rt_mutex *lock, int state,
struct hrtimer_sleeper *timeout, int detect_deadlock,
int (*slowfn)(struct rt_mutex *lock, int state,
struct hrtimer_sleeper *timeout,
- int detect_deadlock))
+ int detect_deadlock
+ __COMMA_LOCK_STAT_IP_DECL)
+ __COMMA_LOCK_STAT_IP_DECL)
{
if (!detect_deadlock && likely(rt_mutex_cmpxchg(lock, NULL, current))) {
rt_mutex_deadlock_account_lock(lock, current);
return 0;
} else
- return slowfn(lock, state, timeout, detect_deadlock);
+ return slowfn(lock, state, timeout, detect_deadlock
+ __COMMA_LOCK_STAT_IP);
}
static inline int
rt_mutex_fasttrylock(struct rt_mutex *lock,
- int (*slowfn)(struct rt_mutex *lock))
+ int (*slowfn)(struct rt_mutex *lock
+ __COMMA_LOCK_STAT_IP_DECL)
+ __COMMA_LOCK_STAT_IP_DECL)
{
if (likely(rt_mutex_cmpxchg(lock, NULL, current))) {
rt_mutex_deadlock_account_lock(lock, current);
return 1;
}
- return slowfn(lock);
+ return slowfn(lock __COMMA_LOCK_STAT_IP);
}
static inline void
@@ -1147,6 +1274,17 @@ rt_mutex_fastunlock(struct rt_mutex *loc
slowfn(lock);
}
+#define PANIC_IF_IN_ATOMIC() \
+ if ( \
+ (system_state == SYSTEM_RUNNING) && \
+ in_atomic() && \
+ !oops_in_progress && \
+ !current->exit_state \
+ ) { \
+ panic("%s: in atomic: " "%s/0x%08x/%d\n", \
+ __func__, current->comm, preempt_count(), current->pid); \
+ }
+
/**
* rt_mutex_lock - lock a rt_mutex
*
@@ -1155,11 +1293,26 @@ void __sched rt_mutex_lock(struct rt_mut
void __sched rt_mutex_lock(struct rt_mutex *lock)
{
might_sleep();
+ PANIC_IF_IN_ATOMIC();
- rt_mutex_fastlock(lock, TASK_UNINTERRUPTIBLE, 0, rt_mutex_slowlock);
+ rt_mutex_fastlock(lock, TASK_UNINTERRUPTIBLE, 0, rt_mutex_slowlock
+ __COMMA_LOCK_STAT_RET_IP);
}
EXPORT_SYMBOL_GPL(rt_mutex_lock);
+#ifdef CONFIG_LOCK_STAT
+void __sched rt_mutex_lock_with_ip(struct rt_mutex *lock, unsigned long ip)
+{
+ might_sleep();
+ PANIC_IF_IN_ATOMIC();
+
+ rt_mutex_fastlock_with_ip(lock, TASK_UNINTERRUPTIBLE, 0, rt_mutex_slowlock,
+ ip);
+}
+EXPORT_SYMBOL_GPL(rt_mutex_lock_with_ip);
+#endif
+
+
/**
* rt_mutex_lock_interruptible - lock a rt_mutex interruptible
*
@@ -1175,11 +1328,23 @@ int __sched rt_mutex_lock_interruptible(
int detect_deadlock)
{
might_sleep();
+ return rt_mutex_fastlock(lock, TASK_INTERRUPTIBLE,
+ detect_deadlock, rt_mutex_slowlock
+ __COMMA_LOCK_STAT_RET_IP);
+}
+EXPORT_SYMBOL_GPL(rt_mutex_lock_interruptible);
+#ifdef CONFIG_LOCK_STAT
+int __sched rt_mutex_lock_interruptible_with_ip(struct rt_mutex *lock,
+ int detect_deadlock,
+ unsigned long ip)
+{
+ might_sleep();
return rt_mutex_fastlock(lock, TASK_INTERRUPTIBLE,
- detect_deadlock, rt_mutex_slowlock);
+ detect_deadlock, rt_mutex_slowlock, ip);
}
-EXPORT_SYMBOL_GPL(rt_mutex_lock_interruptible);
+EXPORT_SYMBOL_GPL(rt_mutex_lock_interruptible_with_ip);
+#endif
/**
* rt_mutex_lock_interruptible_ktime - lock a rt_mutex interruptible
@@ -1203,7 +1368,8 @@ rt_mutex_timed_lock(struct rt_mutex *loc
might_sleep();
return rt_mutex_timed_fastlock(lock, TASK_INTERRUPTIBLE, timeout,
- detect_deadlock, rt_mutex_slowlock);
+ detect_deadlock, rt_mutex_slowlock
+ __COMMA_LOCK_STAT_RET_IP);
}
EXPORT_SYMBOL_GPL(rt_mutex_timed_lock);
@@ -1216,7 +1382,8 @@ int __sched rt_mutex_trylock(struct rt_m
*/
int __sched rt_mutex_trylock(struct rt_mutex *lock)
{
- return rt_mutex_fasttrylock(lock, rt_mutex_slowtrylock);
+ return rt_mutex_fasttrylock(lock, rt_mutex_slowtrylock
+ __COMMA_LOCK_STAT_RET_IP);
}
EXPORT_SYMBOL_GPL(rt_mutex_trylock);
@@ -1231,6 +1398,14 @@ EXPORT_SYMBOL_GPL(rt_mutex_unlock);
}
EXPORT_SYMBOL_GPL(rt_mutex_unlock);
+#ifdef CONFIG_LOCK_STAT
+int __sched rt_mutex_trylock_with_ip(struct rt_mutex *lock, unsigned long _ip)
+{
+ return rt_mutex_fasttrylock(lock, rt_mutex_slowtrylock, _ip);
+}
+EXPORT_SYMBOL_GPL(rt_mutex_trylock_with_ip);
+#endif
+
/***
* rt_mutex_destroy - mark a mutex unusable
* @lock: the mutex to be destroyed
@@ -1258,16 +1433,50 @@ EXPORT_SYMBOL_GPL(rt_mutex_destroy);
*
* Initializing of a locked rt lock is not allowed
*/
-void __rt_mutex_init(struct rt_mutex *lock, const char *name)
+void __rt_mutex_init(struct rt_mutex *lock, const char *name
+ __COMMA_LOCK_STAT_NOTE_PARAM_DECL)
{
- lock->owner = NULL;
- spin_lock_init(&lock->wait_lock);
+ rt_mutex_clear_owner(lock);
+ spin_lock_init(&lock->wait_lock); /* raw spinlock here */
plist_head_init(&lock->wait_list, &lock->wait_lock);
debug_rt_mutex_init(lock, name);
+#ifdef CONFIG_LOCK_STAT
+ lock->lock_stat = NULL;
+ lock_stat_scoped_attach(&lock->lock_stat, LOCK_STAT_NOTE_VARS);
+#endif
}
EXPORT_SYMBOL_GPL(__rt_mutex_init);
+/*
+ * Annotated version of lock_stat
+ */
+#ifdef CONFIG_LOCK_STAT
+void __rt_mutex_init_annotated(struct rt_mutex *lock, const char *name,
+ LOCK_STAT_NOTE_PARAM_DECL,
+ struct lock_stat *lsobject)
+{
+ rt_mutex_clear_owner(lock);
+ spin_lock_init(&lock->wait_lock); /* raw spinlock here */
+ plist_head_init(&lock->wait_list, &lock->wait_lock);
+
+ debug_rt_mutex_init(lock, name);
+
+ BUG_ON(!lsobject);
+ lock->lock_stat = lsobject;
+
+ if(!lock_stat_is_initialized(&lock->lock_stat))
+ {
+ ksym_strcpy(lock->lock_stat->function, _function);
+ lock->lock_stat->file = (char *) _file;
+ lock->lock_stat->line = _line;
+ }
+
+ atomic_inc(&lock->lock_stat->ninlined);
+}
+#endif
+EXPORT_SYMBOL_GPL(__rt_mutex_init_annotated);
+
/**
* rt_mutex_init_proxy_locked - initialize and lock a rt_mutex on behalf of a
* proxy owner
@@ -1281,7 +1490,7 @@ void rt_mutex_init_proxy_locked(struct r
void rt_mutex_init_proxy_locked(struct rt_mutex *lock,
struct task_struct *proxy_owner)
{
- __rt_mutex_init(lock, NULL);
+ __rt_mutex_init(lock, NULL __COMMA_LOCK_STAT_NOTE);
debug_rt_mutex_proxy_lock(lock, proxy_owner);
rt_mutex_set_owner(lock, proxy_owner, 0);
rt_mutex_deadlock_account_lock(lock, proxy_owner);
^ permalink raw reply [flat|nested] 2+ messages in thread