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-rw-r--r--kernel/locking/mutex.c3
-rw-r--r--kernel/locking/percpu-rwsem.c5
-rw-r--r--kernel/locking/qrwlock.c9
-rw-r--r--kernel/locking/qspinlock.c5
-rw-r--r--kernel/locking/rtmutex.c11
-rw-r--r--kernel/locking/rwbase_rt.c7
-rw-r--r--kernel/locking/rwsem.c9
-rw-r--r--kernel/locking/semaphore.c15
8 files changed, 63 insertions, 1 deletions
diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c
index ee2fd7614a93..c88deda77cf2 100644
--- a/kernel/locking/mutex.c
+++ b/kernel/locking/mutex.c
@@ -644,6 +644,7 @@ __mutex_lock_common(struct mutex *lock, unsigned int state, unsigned int subclas
}
set_current_state(state);
+ trace_contention_begin(lock, 0);
for (;;) {
bool first;
@@ -710,6 +711,7 @@ acquired:
skip_wait:
/* got the lock - cleanup and rejoice! */
lock_acquired(&lock->dep_map, ip);
+ trace_contention_end(lock, 0);
if (ww_ctx)
ww_mutex_lock_acquired(ww, ww_ctx);
@@ -721,6 +723,7 @@ skip_wait:
err:
__set_current_state(TASK_RUNNING);
__mutex_remove_waiter(lock, &waiter);
+ trace_contention_end(lock, ret);
err_early_kill:
raw_spin_unlock(&lock->wait_lock);
debug_mutex_free_waiter(&waiter);
diff --git a/kernel/locking/percpu-rwsem.c b/kernel/locking/percpu-rwsem.c
index c9fdae94e098..5fe4c5495ba3 100644
--- a/kernel/locking/percpu-rwsem.c
+++ b/kernel/locking/percpu-rwsem.c
@@ -9,6 +9,7 @@
#include <linux/sched/task.h>
#include <linux/sched/debug.h>
#include <linux/errno.h>
+#include <trace/events/lock.h>
int __percpu_init_rwsem(struct percpu_rw_semaphore *sem,
const char *name, struct lock_class_key *key)
@@ -171,9 +172,11 @@ bool __sched __percpu_down_read(struct percpu_rw_semaphore *sem, bool try)
if (try)
return false;
+ trace_contention_begin(sem, LCB_F_PERCPU | LCB_F_READ);
preempt_enable();
percpu_rwsem_wait(sem, /* .reader = */ true);
preempt_disable();
+ trace_contention_end(sem, 0);
return true;
}
@@ -216,6 +219,7 @@ void __sched percpu_down_write(struct percpu_rw_semaphore *sem)
{
might_sleep();
rwsem_acquire(&sem->dep_map, 0, 0, _RET_IP_);
+ trace_contention_begin(sem, LCB_F_PERCPU | LCB_F_WRITE);
/* Notify readers to take the slow path. */
rcu_sync_enter(&sem->rss);
@@ -237,6 +241,7 @@ void __sched percpu_down_write(struct percpu_rw_semaphore *sem)
/* Wait for all active readers to complete. */
rcuwait_wait_event(&sem->writer, readers_active_check(sem), TASK_UNINTERRUPTIBLE);
+ trace_contention_end(sem, 0);
}
EXPORT_SYMBOL_GPL(percpu_down_write);
diff --git a/kernel/locking/qrwlock.c b/kernel/locking/qrwlock.c
index ec36b73f4733..7f42e52a648f 100644
--- a/kernel/locking/qrwlock.c
+++ b/kernel/locking/qrwlock.c
@@ -12,6 +12,7 @@
#include <linux/percpu.h>
#include <linux/hardirq.h>
#include <linux/spinlock.h>
+#include <trace/events/lock.h>
/**
* queued_read_lock_slowpath - acquire read lock of a queue rwlock
@@ -34,6 +35,8 @@ void queued_read_lock_slowpath(struct qrwlock *lock)
}
atomic_sub(_QR_BIAS, &lock->cnts);
+ trace_contention_begin(lock, LCB_F_SPIN | LCB_F_READ);
+
/*
* Put the reader into the wait queue
*/
@@ -51,6 +54,8 @@ void queued_read_lock_slowpath(struct qrwlock *lock)
* Signal the next one in queue to become queue head
*/
arch_spin_unlock(&lock->wait_lock);
+
+ trace_contention_end(lock, 0);
}
EXPORT_SYMBOL(queued_read_lock_slowpath);
@@ -62,6 +67,8 @@ void queued_write_lock_slowpath(struct qrwlock *lock)
{
int cnts;
+ trace_contention_begin(lock, LCB_F_SPIN | LCB_F_WRITE);
+
/* Put the writer into the wait queue */
arch_spin_lock(&lock->wait_lock);
@@ -79,5 +86,7 @@ void queued_write_lock_slowpath(struct qrwlock *lock)
} while (!atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED));
unlock:
arch_spin_unlock(&lock->wait_lock);
+
+ trace_contention_end(lock, 0);
}
EXPORT_SYMBOL(queued_write_lock_slowpath);
diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c
index cbff6ba53d56..65a9a10caa6f 100644
--- a/kernel/locking/qspinlock.c
+++ b/kernel/locking/qspinlock.c
@@ -22,6 +22,7 @@
#include <linux/prefetch.h>
#include <asm/byteorder.h>
#include <asm/qspinlock.h>
+#include <trace/events/lock.h>
/*
* Include queued spinlock statistics code
@@ -401,6 +402,8 @@ pv_queue:
idx = node->count++;
tail = encode_tail(smp_processor_id(), idx);
+ trace_contention_begin(lock, LCB_F_SPIN);
+
/*
* 4 nodes are allocated based on the assumption that there will
* not be nested NMIs taking spinlocks. That may not be true in
@@ -554,6 +557,8 @@ locked:
pv_kick_node(lock, next);
release:
+ trace_contention_end(lock, 0);
+
/*
* release the node
*/
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index 8555c4efe97c..7779ee8abc2a 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -24,6 +24,8 @@
#include <linux/sched/wake_q.h>
#include <linux/ww_mutex.h>
+#include <trace/events/lock.h>
+
#include "rtmutex_common.h"
#ifndef WW_RT
@@ -1579,6 +1581,8 @@ static int __sched __rt_mutex_slowlock(struct rt_mutex_base *lock,
set_current_state(state);
+ trace_contention_begin(lock, LCB_F_RT);
+
ret = task_blocks_on_rt_mutex(lock, waiter, current, ww_ctx, chwalk);
if (likely(!ret))
ret = rt_mutex_slowlock_block(lock, ww_ctx, state, NULL, waiter);
@@ -1601,6 +1605,9 @@ static int __sched __rt_mutex_slowlock(struct rt_mutex_base *lock,
* unconditionally. We might have to fix that up.
*/
fixup_rt_mutex_waiters(lock);
+
+ trace_contention_end(lock, ret);
+
return ret;
}
@@ -1683,6 +1690,8 @@ static void __sched rtlock_slowlock_locked(struct rt_mutex_base *lock)
/* Save current state and set state to TASK_RTLOCK_WAIT */
current_save_and_set_rtlock_wait_state();
+ trace_contention_begin(lock, LCB_F_RT);
+
task_blocks_on_rt_mutex(lock, &waiter, current, NULL, RT_MUTEX_MIN_CHAINWALK);
for (;;) {
@@ -1712,6 +1721,8 @@ static void __sched rtlock_slowlock_locked(struct rt_mutex_base *lock)
*/
fixup_rt_mutex_waiters(lock);
debug_rt_mutex_free_waiter(&waiter);
+
+ trace_contention_end(lock, 0);
}
static __always_inline void __sched rtlock_slowlock(struct rt_mutex_base *lock)
diff --git a/kernel/locking/rwbase_rt.c b/kernel/locking/rwbase_rt.c
index 6fd3162e4098..c201aadb9301 100644
--- a/kernel/locking/rwbase_rt.c
+++ b/kernel/locking/rwbase_rt.c
@@ -112,6 +112,8 @@ static int __sched __rwbase_read_lock(struct rwbase_rt *rwb,
* Reader2 to call up_read(), which might be unbound.
*/
+ trace_contention_begin(rwb, LCB_F_RT | LCB_F_READ);
+
/*
* For rwlocks this returns 0 unconditionally, so the below
* !ret conditionals are optimized out.
@@ -130,6 +132,8 @@ static int __sched __rwbase_read_lock(struct rwbase_rt *rwb,
raw_spin_unlock_irq(&rtm->wait_lock);
if (!ret)
rwbase_rtmutex_unlock(rtm);
+
+ trace_contention_end(rwb, ret);
return ret;
}
@@ -247,11 +251,13 @@ static int __sched rwbase_write_lock(struct rwbase_rt *rwb,
goto out_unlock;
rwbase_set_and_save_current_state(state);
+ trace_contention_begin(rwb, LCB_F_RT | LCB_F_WRITE);
for (;;) {
/* Optimized out for rwlocks */
if (rwbase_signal_pending_state(state, current)) {
rwbase_restore_current_state();
__rwbase_write_unlock(rwb, 0, flags);
+ trace_contention_end(rwb, -EINTR);
return -EINTR;
}
@@ -265,6 +271,7 @@ static int __sched rwbase_write_lock(struct rwbase_rt *rwb,
set_current_state(state);
}
rwbase_restore_current_state();
+ trace_contention_end(rwb, 0);
out_unlock:
raw_spin_unlock_irqrestore(&rtm->wait_lock, flags);
diff --git a/kernel/locking/rwsem.c b/kernel/locking/rwsem.c
index 16b532bb5b92..9d1db4a54d34 100644
--- a/kernel/locking/rwsem.c
+++ b/kernel/locking/rwsem.c
@@ -27,6 +27,7 @@
#include <linux/export.h>
#include <linux/rwsem.h>
#include <linux/atomic.h>
+#include <trace/events/lock.h>
#ifndef CONFIG_PREEMPT_RT
#include "lock_events.h"
@@ -1056,6 +1057,8 @@ queue:
if (!wake_q_empty(&wake_q))
wake_up_q(&wake_q);
+ trace_contention_begin(sem, LCB_F_READ);
+
/* wait to be given the lock */
for (;;) {
set_current_state(state);
@@ -1077,12 +1080,14 @@ queue:
__set_current_state(TASK_RUNNING);
lockevent_inc(rwsem_rlock);
+ trace_contention_end(sem, 0);
return sem;
out_nolock:
rwsem_del_wake_waiter(sem, &waiter, &wake_q);
__set_current_state(TASK_RUNNING);
lockevent_inc(rwsem_rlock_fail);
+ trace_contention_end(sem, -EINTR);
return ERR_PTR(-EINTR);
}
@@ -1132,6 +1137,8 @@ rwsem_down_write_slowpath(struct rw_semaphore *sem, int state)
/* wait until we successfully acquire the lock */
set_current_state(state);
+ trace_contention_begin(sem, LCB_F_WRITE);
+
for (;;) {
if (rwsem_try_write_lock(sem, &waiter)) {
/* rwsem_try_write_lock() implies ACQUIRE on success */
@@ -1171,6 +1178,7 @@ trylock_again:
__set_current_state(TASK_RUNNING);
raw_spin_unlock_irq(&sem->wait_lock);
lockevent_inc(rwsem_wlock);
+ trace_contention_end(sem, 0);
return sem;
out_nolock:
@@ -1178,6 +1186,7 @@ out_nolock:
raw_spin_lock_irq(&sem->wait_lock);
rwsem_del_wake_waiter(sem, &waiter, &wake_q);
lockevent_inc(rwsem_wlock_fail);
+ trace_contention_end(sem, -EINTR);
return ERR_PTR(-EINTR);
}
diff --git a/kernel/locking/semaphore.c b/kernel/locking/semaphore.c
index 9ee381e4d2a4..f2654d2fe43a 100644
--- a/kernel/locking/semaphore.c
+++ b/kernel/locking/semaphore.c
@@ -32,6 +32,7 @@
#include <linux/semaphore.h>
#include <linux/spinlock.h>
#include <linux/ftrace.h>
+#include <trace/events/lock.h>
static noinline void __down(struct semaphore *sem);
static noinline int __down_interruptible(struct semaphore *sem);
@@ -205,7 +206,7 @@ struct semaphore_waiter {
* constant, and thus optimised away by the compiler. Likewise the
* 'timeout' parameter for the cases without timeouts.
*/
-static inline int __sched __down_common(struct semaphore *sem, long state,
+static inline int __sched ___down_common(struct semaphore *sem, long state,
long timeout)
{
struct semaphore_waiter waiter;
@@ -236,6 +237,18 @@ static inline int __sched __down_common(struct semaphore *sem, long state,
return -EINTR;
}
+static inline int __sched __down_common(struct semaphore *sem, long state,
+ long timeout)
+{
+ int ret;
+
+ trace_contention_begin(sem, 0);
+ ret = ___down_common(sem, state, timeout);
+ trace_contention_end(sem, ret);
+
+ return ret;
+}
+
static noinline void __sched __down(struct semaphore *sem)
{
__down_common(sem, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 12:25:52 +0000