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rcutorture: Add torture tests for RCU Tasks Rude

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This commit adds the definitions required to torture the rude flavor of
RCU tasks.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2020-03-03 15:02:50 -08:00
parent c84aad7654
commit 3d6e43c75d
6 changed files with 44 additions and 2 deletions
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2
kernel/rcu/Kconfig.debug
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@ -29,6 +29,7 @@ config RCU_PERF_TEST
select TORTURE_TEST
select SRCU
select TASKS_RCU
select TASKS_RUDE_RCU
default n
help
This option provides a kernel module that runs performance
@ -46,6 +47,7 @@ config RCU_TORTURE_TEST
select TORTURE_TEST
select SRCU
select TASKS_RCU
select TASKS_RUDE_RCU
default n
help
This option provides a kernel module that runs torture tests

1
kernel/rcu/rcu.h
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@ -441,6 +441,7 @@ void rcu_request_urgent_qs_task(struct task_struct *t);
enum rcutorture_type {
RCU_FLAVOR,
RCU_TASKS_FLAVOR,
RCU_TASKS_RUDE_FLAVOR,
RCU_TRIVIAL_FLAVOR,
SRCU_FLAVOR,
INVALID_RCU_FLAVOR

31
kernel/rcu/rcutorture.c
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@ -730,6 +730,33 @@ static struct rcu_torture_ops trivial_ops = {
.name = "trivial"
};
/*
* Definitions for rude RCU-tasks torture testing.
*/
static void rcu_tasks_rude_torture_deferred_free(struct rcu_torture *p)
{
call_rcu_tasks_rude(&p->rtort_rcu, rcu_torture_cb);
}
static struct rcu_torture_ops tasks_rude_ops = {
.ttype = RCU_TASKS_RUDE_FLAVOR,
.init = rcu_sync_torture_init,
.readlock = rcu_torture_read_lock_trivial,
.read_delay = rcu_read_delay, /* just reuse rcu's version. */
.readunlock = rcu_torture_read_unlock_trivial,
.get_gp_seq = rcu_no_completed,
.deferred_free = rcu_tasks_rude_torture_deferred_free,
.sync = synchronize_rcu_tasks_rude,
.exp_sync = synchronize_rcu_tasks_rude,
.call = call_rcu_tasks_rude,
.cb_barrier = rcu_barrier_tasks_rude,
.fqs = NULL,
.stats = NULL,
.irq_capable = 1,
.name = "tasks-rude"
};
static unsigned long rcutorture_seq_diff(unsigned long new, unsigned long old)
{
if (!cur_ops->gp_diff)
@ -739,7 +766,7 @@ static unsigned long rcutorture_seq_diff(unsigned long new, unsigned long old)
static bool __maybe_unused torturing_tasks(void)
{
return cur_ops == &tasks_ops;
return cur_ops == &tasks_ops || cur_ops == &tasks_rude_ops;
}
/*
@ -2413,7 +2440,7 @@ rcu_torture_init(void)
int firsterr = 0;
static struct rcu_torture_ops *torture_ops[] = {
&rcu_ops, &rcu_busted_ops, &srcu_ops, &srcud_ops,
&busted_srcud_ops, &tasks_ops, &trivial_ops,
&busted_srcud_ops, &tasks_ops, &tasks_rude_ops, &trivial_ops,
};
if (!torture_init_begin(torture_type, verbose))

1
tools/testing/selftests/rcutorture/configs/rcu/CFLIST
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@ -14,3 +14,4 @@ TINY02
TASKS01
TASKS02
TASKS03
RUDE01

10
tools/testing/selftests/rcutorture/configs/rcu/RUDE01 Normal file
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@ -0,0 +1,10 @@
CONFIG_SMP=y
CONFIG_NR_CPUS=2
CONFIG_HOTPLUG_CPU=y
CONFIG_PREEMPT_NONE=n
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=y
CONFIG_DEBUG_LOCK_ALLOC=y
CONFIG_PROVE_LOCKING=y
#CHECK#CONFIG_PROVE_RCU=y
CONFIG_RCU_EXPERT=y

1
tools/testing/selftests/rcutorture/configs/rcu/RUDE01.boot Normal file
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@ -0,0 +1 @@
rcutorture.torture_type=tasks-rude