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locktorture: Add nested locking to mutex torture tests

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This patch adds randomized nested locking to the mutex torture
tests, as well as new LOCK08 config files for testing mutexes
with nested locking

Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Valentin Schneider <vschneid@redhat.com>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: kernel-team@android.com
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Co-developed-by: Connor O'Brien <connoro@google.com>
Signed-off-by: Connor O'Brien <connoro@google.com>
Signed-off-by: John Stultz <jstultz@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
John Stultz 2023-02-21 19:02:36 +00:00 committed by Paul E. McKenney
parent b63343207d
commit 3e5aeaf534
4 changed files with 43 additions and 0 deletions
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35
kernel/locking/locktorture.c
View File

@ -370,6 +370,28 @@ static struct lock_torture_ops rw_lock_irq_ops = {
};
static DEFINE_MUTEX(torture_mutex);
static struct mutex torture_nested_mutexes[MAX_NESTED_LOCKS];
static struct lock_class_key nested_mutex_keys[MAX_NESTED_LOCKS];
static void torture_mutex_init(void)
{
int i;
for (i = 0; i < MAX_NESTED_LOCKS; i++)
__mutex_init(&torture_nested_mutexes[i], __func__,
&nested_mutex_keys[i]);
}
static int torture_mutex_nested_lock(int tid __maybe_unused,
u32 lockset)
{
int i;
for (i = 0; i < nested_locks; i++)
if (lockset & (1 << i))
mutex_lock(&torture_nested_mutexes[i]);
return 0;
}
static int torture_mutex_lock(int tid __maybe_unused)
__acquires(torture_mutex)
@ -398,11 +420,24 @@ __releases(torture_mutex)
mutex_unlock(&torture_mutex);
}
static void torture_mutex_nested_unlock(int tid __maybe_unused,
u32 lockset)
{
int i;
for (i = nested_locks - 1; i >= 0; i--)
if (lockset & (1 << i))
mutex_unlock(&torture_nested_mutexes[i]);
}
static struct lock_torture_ops mutex_lock_ops = {
.init = torture_mutex_init,
.nested_lock = torture_mutex_nested_lock,
.writelock = torture_mutex_lock,
.write_delay = torture_mutex_delay,
.task_boost = torture_rt_boost,
.writeunlock = torture_mutex_unlock,
.nested_unlock = torture_mutex_nested_unlock,
.readlock = NULL,
.read_delay = NULL,
.readunlock = NULL,

1
tools/testing/selftests/rcutorture/configs/lock/CFLIST
View File

@ -5,3 +5,4 @@ LOCK04
LOCK05
LOCK06
LOCK07
LOCK08

6
tools/testing/selftests/rcutorture/configs/lock/LOCK08 Normal file
View File

@ -0,0 +1,6 @@
CONFIG_SMP=y
CONFIG_NR_CPUS=4
CONFIG_HOTPLUG_CPU=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=y

1
tools/testing/selftests/rcutorture/configs/lock/LOCK08.boot Normal file
View File

@ -0,0 +1 @@
locktorture.torture_type=mutex_lock locktorture.nested_locks=8