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locktorture: Add torture tests for percpu_rwsem

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This commit adds percpu_rwsem tests based on the earlier rwsem tests.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
This commit is contained in:
Paul E. McKenney
2015-08-29 14:46:29 -07:00
parent 302707fd7c
commit 617783dd99
4 changed files with 52 additions and 0 deletions
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44
kernel/locking/locktorture.c
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@ -36,6 +36,7 @@
#include <linux/moduleparam.h> #include <linux/moduleparam.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/percpu-rwsem.h>
#include <linux/torture.h> #include <linux/torture.h>
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");
@ -526,6 +527,48 @@ static struct lock_torture_ops rwsem_lock_ops = {
.name = "rwsem_lock" .name = "rwsem_lock"
}; };
#include <linux/percpu-rwsem.h>
static struct percpu_rw_semaphore pcpu_rwsem;
void torture_percpu_rwsem_init(void)
{
BUG_ON(percpu_init_rwsem(&pcpu_rwsem));
}
static int torture_percpu_rwsem_down_write(void) __acquires(pcpu_rwsem)
{
percpu_down_write(&pcpu_rwsem);
return 0;
}
static void torture_percpu_rwsem_up_write(void) __releases(pcpu_rwsem)
{
percpu_up_write(&pcpu_rwsem);
}
static int torture_percpu_rwsem_down_read(void) __acquires(pcpu_rwsem)
{
percpu_down_read(&pcpu_rwsem);
return 0;
}
static void torture_percpu_rwsem_up_read(void) __releases(pcpu_rwsem)
{
percpu_up_read(&pcpu_rwsem);
}
static struct lock_torture_ops percpu_rwsem_lock_ops = {
.init = torture_percpu_rwsem_init,
.writelock = torture_percpu_rwsem_down_write,
.write_delay = torture_rwsem_write_delay,
.task_boost = torture_boost_dummy,
.writeunlock = torture_percpu_rwsem_up_write,
.readlock = torture_percpu_rwsem_down_read,
.read_delay = torture_rwsem_read_delay,
.readunlock = torture_percpu_rwsem_up_read,
.name = "percpu_rwsem_lock"
};
/* /*
* Lock torture writer kthread. Repeatedly acquires and releases * Lock torture writer kthread. Repeatedly acquires and releases
* the lock, checking for duplicate acquisitions. * the lock, checking for duplicate acquisitions.
@ -749,6 +792,7 @@ static int __init lock_torture_init(void)
&rtmutex_lock_ops, &rtmutex_lock_ops,
#endif #endif
&rwsem_lock_ops, &rwsem_lock_ops,
&percpu_rwsem_lock_ops,
}; };
if (!torture_init_begin(torture_type, verbose, &torture_runnable)) if (!torture_init_begin(torture_type, verbose, &torture_runnable))

1
tools/testing/selftests/rcutorture/configs/lock/CFLIST
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@ -3,3 +3,4 @@ LOCK02
LOCK03 LOCK03
LOCK04 LOCK04
LOCK05 LOCK05
LOCK06

6
tools/testing/selftests/rcutorture/configs/lock/LOCK06 Normal file
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@ -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/LOCK06.boot Normal file
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@ -0,0 +1 @@
locktorture.torture_type=percpu_rwsem_lock