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rcutorture: Add torture tests for RCU Tasks Trace

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

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2020-03-10 10:32:30 -07:00
parent d5f177d35c
commit c1a76c0b6a
6 changed files with 58 additions and 1 deletions
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2
kernel/rcu/Kconfig.debug
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@ -30,6 +30,7 @@ config RCU_PERF_TEST
select SRCU
select TASKS_RCU
select TASKS_RUDE_RCU
select TASKS_TRACE_RCU
default n
help
This option provides a kernel module that runs performance
@ -48,6 +49,7 @@ config RCU_TORTURE_TEST
select SRCU
select TASKS_RCU
select TASKS_RUDE_RCU
select TASKS_TRACE_RCU
default n
help
This option provides a kernel module that runs torture tests

1
kernel/rcu/rcu.h
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@ -442,6 +442,7 @@ enum rcutorture_type {
RCU_FLAVOR,
RCU_TASKS_FLAVOR,
RCU_TASKS_RUDE_FLAVOR,
RCU_TASKS_TRACING_FLAVOR,
RCU_TRIVIAL_FLAVOR,
SRCU_FLAVOR,
INVALID_RCU_FLAVOR

44
kernel/rcu/rcutorture.c
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@ -45,6 +45,7 @@
#include <linux/sched/sysctl.h>
#include <linux/oom.h>
#include <linux/tick.h>
#include <linux/rcupdate_trace.h>
#include "rcu.h"
@ -757,6 +758,45 @@ static struct rcu_torture_ops tasks_rude_ops = {
.name = "tasks-rude"
};
/*
* Definitions for tracing RCU-tasks torture testing.
*/
static int tasks_tracing_torture_read_lock(void)
{
rcu_read_lock_trace();
return 0;
}
static void tasks_tracing_torture_read_unlock(int idx)
{
rcu_read_unlock_trace();
}
static void rcu_tasks_tracing_torture_deferred_free(struct rcu_torture *p)
{
call_rcu_tasks_trace(&p->rtort_rcu, rcu_torture_cb);
}
static struct rcu_torture_ops tasks_tracing_ops = {
.ttype = RCU_TASKS_TRACING_FLAVOR,
.init = rcu_sync_torture_init,
.readlock = tasks_tracing_torture_read_lock,
.read_delay = srcu_read_delay, /* just reuse srcu's version. */
.readunlock = tasks_tracing_torture_read_unlock,
.get_gp_seq = rcu_no_completed,
.deferred_free = rcu_tasks_tracing_torture_deferred_free,
.sync = synchronize_rcu_tasks_trace,
.exp_sync = synchronize_rcu_tasks_trace,
.call = call_rcu_tasks_trace,
.cb_barrier = rcu_barrier_tasks_trace,
.fqs = NULL,
.stats = NULL,
.irq_capable = 1,
.slow_gps = 1,
.name = "tasks-tracing"
};
static unsigned long rcutorture_seq_diff(unsigned long new, unsigned long old)
{
if (!cur_ops->gp_diff)
@ -1323,6 +1363,7 @@ static bool rcu_torture_one_read(struct torture_random_state *trsp)
rcu_read_lock_bh_held() ||
rcu_read_lock_sched_held() ||
srcu_read_lock_held(srcu_ctlp) ||
rcu_read_lock_trace_held() ||
torturing_tasks());
if (p == NULL) {
/* Wait for rcu_torture_writer to get underway */
@ -2440,7 +2481,8 @@ 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, &tasks_rude_ops, &trivial_ops,
&busted_srcud_ops, &tasks_ops, &tasks_rude_ops,
&tasks_tracing_ops, &trivial_ops,
};
if (!torture_init_begin(torture_type, verbose))

1
tools/testing/selftests/rcutorture/configs/rcu/CFLIST
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@ -15,3 +15,4 @@ TASKS01
TASKS02
TASKS03
RUDE01
TRACE01

10
tools/testing/selftests/rcutorture/configs/rcu/TRACE01 Normal file
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@ -0,0 +1,10 @@
CONFIG_SMP=y
CONFIG_NR_CPUS=4
CONFIG_HOTPLUG_CPU=y
CONFIG_PREEMPT_NONE=y
CONFIG_PREEMPT_VOLUNTARY=n
CONFIG_PREEMPT=n
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/TRACE01.boot Normal file
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@ -0,0 +1 @@
rcutorture.torture_type=tasks-tracing