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Commit 617783dd authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

locktorture: Add torture tests for percpu_rwsem 



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

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: default avatarJosh Triplett <josh@joshtriplett.org>
parent 302707fd

kernel/locking/locktorture.c

+44 −0
Original line number Diff line number Diff line
@@ -36,6 +36,7 @@ 
#include <linux/moduleparam.h>

#include <linux/delay.h>

#include <linux/slab.h>

#include <linux/percpu-rwsem.h>

#include <linux/torture.h>



MODULE_LICENSE("GPL");
@@ -526,6 +527,48 @@ static struct lock_torture_ops rwsem_lock_ops = { 
	.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

 * the lock, checking for duplicate acquisitions.
@@ -749,6 +792,7 @@ static int __init lock_torture_init(void) 
		&rtmutex_lock_ops,

#endif

		&rwsem_lock_ops,

		&percpu_rwsem_lock_ops,

	};



	if (!torture_init_begin(torture_type, verbose, &torture_runnable))

tools/testing/selftests/rcutorture/configs/lock/CFLIST

+1 −0
Original line number Diff line number Diff line
@@ -3,3 +3,4 @@ LOCK02 
LOCK03

LOCK04

LOCK05

LOCK06

tools/testing/selftests/rcutorture/configs/lock/LOCK06

0 → 100644
+6 −0
Original line number Diff line number Diff line 
CONFIG_SMP=y

CONFIG_NR_CPUS=4

CONFIG_HOTPLUG_CPU=y

CONFIG_PREEMPT_NONE=n

CONFIG_PREEMPT_VOLUNTARY=n

CONFIG_PREEMPT=y

tools/testing/selftests/rcutorture/configs/lock/LOCK06.boot

0 → 100644
+1 −0
Original line number Diff line number Diff line 
locktorture.torture_type=percpu_rwsem_lock