rcutorture: Add a lock_busted to test the test
This commit adds a maximally broken locking primitive in which lock acquisition and release are both no-ops. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
This commit is contained in:
parent
b46f358ae5
commit
e086481baf
|
@ -112,6 +112,37 @@ static struct lock_torture_ops *cur_ops;
|
|||
* Definitions for lock torture testing.
|
||||
*/
|
||||
|
||||
static int torture_lock_busted_write_lock(void)
|
||||
{
|
||||
return 0; /* BUGGY, do not use in real life!!! */
|
||||
}
|
||||
|
||||
static void torture_lock_busted_write_delay(struct torture_random_state *trsp)
|
||||
{
|
||||
const unsigned long longdelay_us = 100;
|
||||
|
||||
/* We want a long delay occasionally to force massive contention. */
|
||||
if (!(torture_random(trsp) %
|
||||
(nrealwriters_stress * 2000 * longdelay_us)))
|
||||
mdelay(longdelay_us);
|
||||
#ifdef CONFIG_PREEMPT
|
||||
if (!(torture_random(trsp) % (nrealwriters_stress * 20000)))
|
||||
preempt_schedule(); /* Allow test to be preempted. */
|
||||
#endif
|
||||
}
|
||||
|
||||
static void torture_lock_busted_write_unlock(void)
|
||||
{
|
||||
/* BUGGY, do not use in real life!!! */
|
||||
}
|
||||
|
||||
static struct lock_torture_ops lock_busted_ops = {
|
||||
.writelock = torture_lock_busted_write_lock,
|
||||
.write_delay = torture_lock_busted_write_delay,
|
||||
.writeunlock = torture_lock_busted_write_unlock,
|
||||
.name = "lock_busted"
|
||||
};
|
||||
|
||||
static DEFINE_SPINLOCK(torture_spinlock);
|
||||
|
||||
static int torture_spin_lock_write_lock(void) __acquires(torture_spinlock)
|
||||
|
@ -320,7 +351,7 @@ static int __init lock_torture_init(void)
|
|||
int i;
|
||||
int firsterr = 0;
|
||||
static struct lock_torture_ops *torture_ops[] = {
|
||||
&spin_lock_ops, &spin_lock_irq_ops,
|
||||
&lock_busted_ops, &spin_lock_ops, &spin_lock_irq_ops,
|
||||
};
|
||||
|
||||
torture_init_begin(torture_type, verbose, &locktorture_runnable);
|
||||
|
|
Loading…
Reference in New Issue