From: Waiman Long <longman@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>, Will Deacon <will@kernel.org>,
Boqun Feng <boqun.feng@gmail.com>,
"Paul E. McKenney" <paulmck@kernel.org>,
Davidlohr Bueso <dave@stgolabs.net>
Cc: linux-kernel@vger.kernel.org, Juri Lelli <juri.lelli@redhat.com>,
Waiman Long <longman@redhat.com>
Subject: [PATCH-tip 4/5] locking/locktorture: Pass thread id to lock/unlock functions
Date: Thu, 18 Mar 2021 13:28:13 -0400 [thread overview]
Message-ID: <20210318172814.4400-5-longman@redhat.com> (raw)
In-Reply-To: <20210318172814.4400-1-longman@redhat.com>
To allow the lock and unlock functions in locktorture to access
per-thread information, we need to pass some hint on how to locate
those information. One way to do this is to pass in a unique thread
id which can then be used to access a global array for thread specific
information.
Change the lock and unlock method to add a thread id parameter which
can be determined by the offset of the lwsp/lrsp pointer from the global
lwsa/lrsa array.
There is no other functional change in this patch.
Signed-off-by: Waiman Long <longman@redhat.com>
---
kernel/locking/locktorture.c | 94 ++++++++++++++++++++++--------------
1 file changed, 58 insertions(+), 36 deletions(-)
diff --git a/kernel/locking/locktorture.c b/kernel/locking/locktorture.c
index 3c27f43ab3e8..90a975a95a13 100644
--- a/kernel/locking/locktorture.c
+++ b/kernel/locking/locktorture.c
@@ -76,13 +76,13 @@ static void lock_torture_cleanup(void);
struct lock_torture_ops {
void (*init)(void);
void (*exit)(void);
- int (*writelock)(void);
+ int (*writelock)(int tid);
void (*write_delay)(struct torture_random_state *trsp);
void (*task_boost)(struct torture_random_state *trsp);
- void (*writeunlock)(void);
- int (*readlock)(void);
+ void (*writeunlock)(int tid);
+ int (*readlock)(int tid);
void (*read_delay)(struct torture_random_state *trsp);
- void (*readunlock)(void);
+ void (*readunlock)(int tid);
unsigned long flags; /* for irq spinlocks */
const char *name;
@@ -105,7 +105,7 @@ static struct lock_torture_cxt cxt = { 0, 0, false, false,
* Definitions for lock torture testing.
*/
-static int torture_lock_busted_write_lock(void)
+static int torture_lock_busted_write_lock(int tid __maybe_unused)
{
return 0; /* BUGGY, do not use in real life!!! */
}
@@ -122,7 +122,7 @@ static void torture_lock_busted_write_delay(struct torture_random_state *trsp)
torture_preempt_schedule(); /* Allow test to be preempted. */
}
-static void torture_lock_busted_write_unlock(void)
+static void torture_lock_busted_write_unlock(int tid __maybe_unused)
{
/* BUGGY, do not use in real life!!! */
}
@@ -145,7 +145,8 @@ static struct lock_torture_ops lock_busted_ops = {
static DEFINE_SPINLOCK(torture_spinlock);
-static int torture_spin_lock_write_lock(void) __acquires(torture_spinlock)
+static int torture_spin_lock_write_lock(int tid __maybe_unused)
+__acquires(torture_spinlock)
{
spin_lock(&torture_spinlock);
return 0;
@@ -169,7 +170,8 @@ static void torture_spin_lock_write_delay(struct torture_random_state *trsp)
torture_preempt_schedule(); /* Allow test to be preempted. */
}
-static void torture_spin_lock_write_unlock(void) __releases(torture_spinlock)
+static void torture_spin_lock_write_unlock(int tid __maybe_unused)
+__releases(torture_spinlock)
{
spin_unlock(&torture_spinlock);
}
@@ -185,7 +187,7 @@ static struct lock_torture_ops spin_lock_ops = {
.name = "spin_lock"
};
-static int torture_spin_lock_write_lock_irq(void)
+static int torture_spin_lock_write_lock_irq(int tid __maybe_unused)
__acquires(torture_spinlock)
{
unsigned long flags;
@@ -195,7 +197,7 @@ __acquires(torture_spinlock)
return 0;
}
-static void torture_lock_spin_write_unlock_irq(void)
+static void torture_lock_spin_write_unlock_irq(int tid __maybe_unused)
__releases(torture_spinlock)
{
spin_unlock_irqrestore(&torture_spinlock, cxt.cur_ops->flags);
@@ -214,7 +216,8 @@ static struct lock_torture_ops spin_lock_irq_ops = {
static DEFINE_RWLOCK(torture_rwlock);
-static int torture_rwlock_write_lock(void) __acquires(torture_rwlock)
+static int torture_rwlock_write_lock(int tid __maybe_unused)
+__acquires(torture_rwlock)
{
write_lock(&torture_rwlock);
return 0;
@@ -235,12 +238,14 @@ static void torture_rwlock_write_delay(struct torture_random_state *trsp)
udelay(shortdelay_us);
}
-static void torture_rwlock_write_unlock(void) __releases(torture_rwlock)
+static void torture_rwlock_write_unlock(int tid __maybe_unused)
+__releases(torture_rwlock)
{
write_unlock(&torture_rwlock);
}
-static int torture_rwlock_read_lock(void) __acquires(torture_rwlock)
+static int torture_rwlock_read_lock(int tid __maybe_unused)
+__acquires(torture_rwlock)
{
read_lock(&torture_rwlock);
return 0;
@@ -261,7 +266,8 @@ static void torture_rwlock_read_delay(struct torture_random_state *trsp)
udelay(shortdelay_us);
}
-static void torture_rwlock_read_unlock(void) __releases(torture_rwlock)
+static void torture_rwlock_read_unlock(int tid __maybe_unused)
+__releases(torture_rwlock)
{
read_unlock(&torture_rwlock);
}
@@ -277,7 +283,8 @@ static struct lock_torture_ops rw_lock_ops = {
.name = "rw_lock"
};
-static int torture_rwlock_write_lock_irq(void) __acquires(torture_rwlock)
+static int torture_rwlock_write_lock_irq(int tid __maybe_unused)
+__acquires(torture_rwlock)
{
unsigned long flags;
@@ -286,13 +293,14 @@ static int torture_rwlock_write_lock_irq(void) __acquires(torture_rwlock)
return 0;
}
-static void torture_rwlock_write_unlock_irq(void)
+static void torture_rwlock_write_unlock_irq(int tid __maybe_unused)
__releases(torture_rwlock)
{
write_unlock_irqrestore(&torture_rwlock, cxt.cur_ops->flags);
}
-static int torture_rwlock_read_lock_irq(void) __acquires(torture_rwlock)
+static int torture_rwlock_read_lock_irq(int tid __maybe_unused)
+__acquires(torture_rwlock)
{
unsigned long flags;
@@ -301,7 +309,7 @@ static int torture_rwlock_read_lock_irq(void) __acquires(torture_rwlock)
return 0;
}
-static void torture_rwlock_read_unlock_irq(void)
+static void torture_rwlock_read_unlock_irq(int tid __maybe_unused)
__releases(torture_rwlock)
{
read_unlock_irqrestore(&torture_rwlock, cxt.cur_ops->flags);
@@ -320,7 +328,8 @@ static struct lock_torture_ops rw_lock_irq_ops = {
static DEFINE_MUTEX(torture_mutex);
-static int torture_mutex_lock(void) __acquires(torture_mutex)
+static int torture_mutex_lock(int tid __maybe_unused)
+__acquires(torture_mutex)
{
mutex_lock(&torture_mutex);
return 0;
@@ -340,7 +349,8 @@ static void torture_mutex_delay(struct torture_random_state *trsp)
torture_preempt_schedule(); /* Allow test to be preempted. */
}
-static void torture_mutex_unlock(void) __releases(torture_mutex)
+static void torture_mutex_unlock(int tid __maybe_unused)
+__releases(torture_mutex)
{
mutex_unlock(&torture_mutex);
}
@@ -372,7 +382,7 @@ static void torture_ww_mutex_init(void)
ww_mutex_init(&torture_ww_mutex_2, &torture_ww_class);
}
-static int torture_ww_mutex_lock(void)
+static int torture_ww_mutex_lock(int tid __maybe_unused)
__acquires(torture_ww_mutex_0)
__acquires(torture_ww_mutex_1)
__acquires(torture_ww_mutex_2)
@@ -417,7 +427,7 @@ __acquires(torture_ww_mutex_2)
return 0;
}
-static void torture_ww_mutex_unlock(void)
+static void torture_ww_mutex_unlock(int tid __maybe_unused)
__releases(torture_ww_mutex_0)
__releases(torture_ww_mutex_1)
__releases(torture_ww_mutex_2)
@@ -442,7 +452,8 @@ static struct lock_torture_ops ww_mutex_lock_ops = {
#ifdef CONFIG_RT_MUTEXES
static DEFINE_RT_MUTEX(torture_rtmutex);
-static int torture_rtmutex_lock(void) __acquires(torture_rtmutex)
+static int torture_rtmutex_lock(int tid __maybe_unused)
+__acquires(torture_rtmutex)
{
rt_mutex_lock(&torture_rtmutex);
return 0;
@@ -498,7 +509,8 @@ static void torture_rtmutex_delay(struct torture_random_state *trsp)
torture_preempt_schedule(); /* Allow test to be preempted. */
}
-static void torture_rtmutex_unlock(void) __releases(torture_rtmutex)
+static void torture_rtmutex_unlock(int tid __maybe_unused)
+__releases(torture_rtmutex)
{
rt_mutex_unlock(&torture_rtmutex);
}
@@ -516,7 +528,8 @@ static struct lock_torture_ops rtmutex_lock_ops = {
#endif
static DECLARE_RWSEM(torture_rwsem);
-static int torture_rwsem_down_write(void) __acquires(torture_rwsem)
+static int torture_rwsem_down_write(int tid __maybe_unused)
+__acquires(torture_rwsem)
{
down_write(&torture_rwsem);
return 0;
@@ -536,12 +549,14 @@ static void torture_rwsem_write_delay(struct torture_random_state *trsp)
torture_preempt_schedule(); /* Allow test to be preempted. */
}
-static void torture_rwsem_up_write(void) __releases(torture_rwsem)
+static void torture_rwsem_up_write(int tid __maybe_unused)
+__releases(torture_rwsem)
{
up_write(&torture_rwsem);
}
-static int torture_rwsem_down_read(void) __acquires(torture_rwsem)
+static int torture_rwsem_down_read(int tid __maybe_unused)
+__acquires(torture_rwsem)
{
down_read(&torture_rwsem);
return 0;
@@ -561,7 +576,8 @@ static void torture_rwsem_read_delay(struct torture_random_state *trsp)
torture_preempt_schedule(); /* Allow test to be preempted. */
}
-static void torture_rwsem_up_read(void) __releases(torture_rwsem)
+static void torture_rwsem_up_read(int tid __maybe_unused)
+__releases(torture_rwsem)
{
up_read(&torture_rwsem);
}
@@ -590,24 +606,28 @@ static void torture_percpu_rwsem_exit(void)
percpu_free_rwsem(&pcpu_rwsem);
}
-static int torture_percpu_rwsem_down_write(void) __acquires(pcpu_rwsem)
+static int torture_percpu_rwsem_down_write(int tid __maybe_unused)
+__acquires(pcpu_rwsem)
{
percpu_down_write(&pcpu_rwsem);
return 0;
}
-static void torture_percpu_rwsem_up_write(void) __releases(pcpu_rwsem)
+static void torture_percpu_rwsem_up_write(int tid __maybe_unused)
+__releases(pcpu_rwsem)
{
percpu_up_write(&pcpu_rwsem);
}
-static int torture_percpu_rwsem_down_read(void) __acquires(pcpu_rwsem)
+static int torture_percpu_rwsem_down_read(int tid __maybe_unused)
+__acquires(pcpu_rwsem)
{
percpu_down_read(&pcpu_rwsem);
return 0;
}
-static void torture_percpu_rwsem_up_read(void) __releases(pcpu_rwsem)
+static void torture_percpu_rwsem_up_read(int tid __maybe_unused)
+__releases(pcpu_rwsem)
{
percpu_up_read(&pcpu_rwsem);
}
@@ -632,6 +652,7 @@ static struct lock_torture_ops percpu_rwsem_lock_ops = {
static int lock_torture_writer(void *arg)
{
struct lock_stress_stats *lwsp = arg;
+ int tid = lwsp - cxt.lwsa;
DEFINE_TORTURE_RANDOM(rand);
VERBOSE_TOROUT_STRING("lock_torture_writer task started");
@@ -642,7 +663,7 @@ static int lock_torture_writer(void *arg)
schedule_timeout_uninterruptible(1);
cxt.cur_ops->task_boost(&rand);
- cxt.cur_ops->writelock();
+ cxt.cur_ops->writelock(tid);
if (WARN_ON_ONCE(lock_is_write_held))
lwsp->n_lock_fail++;
lock_is_write_held = true;
@@ -653,7 +674,7 @@ static int lock_torture_writer(void *arg)
cxt.cur_ops->write_delay(&rand);
lock_is_write_held = false;
WRITE_ONCE(last_lock_release, jiffies);
- cxt.cur_ops->writeunlock();
+ cxt.cur_ops->writeunlock(tid);
stutter_wait("lock_torture_writer");
} while (!torture_must_stop());
@@ -670,6 +691,7 @@ static int lock_torture_writer(void *arg)
static int lock_torture_reader(void *arg)
{
struct lock_stress_stats *lrsp = arg;
+ int tid = lrsp - cxt.lrsa;
DEFINE_TORTURE_RANDOM(rand);
VERBOSE_TOROUT_STRING("lock_torture_reader task started");
@@ -679,7 +701,7 @@ static int lock_torture_reader(void *arg)
if ((torture_random(&rand) & 0xfffff) == 0)
schedule_timeout_uninterruptible(1);
- cxt.cur_ops->readlock();
+ cxt.cur_ops->readlock(tid);
lock_is_read_held = true;
if (WARN_ON_ONCE(lock_is_write_held))
lrsp->n_lock_fail++; /* rare, but... */
@@ -687,7 +709,7 @@ static int lock_torture_reader(void *arg)
lrsp->n_lock_acquired++;
cxt.cur_ops->read_delay(&rand);
lock_is_read_held = false;
- cxt.cur_ops->readunlock();
+ cxt.cur_ops->readunlock(tid);
stutter_wait("lock_torture_reader");
} while (!torture_must_stop());
--
2.18.1
next prev parent reply other threads:[~2021-03-18 17:29 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-18 17:28 [PATCH-tip 0/5] locking/locktorture: Fix locktorture ww_mutex test problems Waiman Long
2021-03-18 17:28 ` [PATCH-tip 1/5] locking/ww_mutex: Revert "Treat ww_mutex_lock() like a trylock" Waiman Long
2021-03-18 17:28 ` [PATCH-tip 2/5] locking/locktorture: Fix false positive circular locking splat in ww_mutex test Waiman Long
2021-03-19 12:54 ` [tip: locking/core] " tip-bot2 for Waiman Long
2021-03-18 17:28 ` [PATCH-tip 3/5] locking/ww_mutex: Remove DEFINE_WW_MUTEX() macro Waiman Long
2021-03-19 12:54 ` [tip: locking/core] " tip-bot2 for Waiman Long
2021-03-18 17:28 ` Waiman Long [this message]
2021-03-19 12:54 ` [tip: locking/core] locking/locktorture: Pass thread id to lock/unlock functions tip-bot2 for Waiman Long
2021-03-18 17:28 ` [PATCH-tip 5/5] locking/locktorture: locking/locktorture: Fix incorrect use of ww_acquire_ctx in ww_mutex test Waiman Long
2021-03-19 12:54 ` [tip: locking/core] " tip-bot2 for Waiman Long
2021-03-19 11:10 ` [PATCH-tip 0/5] locking/locktorture: Fix locktorture ww_mutex test problems Ingo Molnar
2021-03-19 11:16 ` Ingo Molnar
2021-03-19 15:29 ` Waiman Long
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