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authorPaul E. McKenney <paulmck@kernel.org>2020-03-04 02:02:50 +0300
committerPaul E. McKenney <paulmck@kernel.org>2020-04-27 21:03:51 +0300
commit3d6e43c75d6bab212e8bc142585ee36eb8e2e5d9 (patch)
treead0e43a904b44582d379e3de14759aaf4f1ffdf8 /kernel/rcu
parentc84aad765406c4c7573ce449e8a9977ebb8f4cb9 (diff)
downloadlinux-3d6e43c75d6bab212e8bc142585ee36eb8e2e5d9.tar.xz
rcutorture: Add torture tests for RCU Tasks Rude
This commit adds the definitions required to torture the rude flavor of RCU tasks. Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu')
-rw-r--r--kernel/rcu/Kconfig.debug2
-rw-r--r--kernel/rcu/rcu.h1
-rw-r--r--kernel/rcu/rcutorture.c31
3 files changed, 32 insertions, 2 deletions
diff --git a/kernel/rcu/Kconfig.debug b/kernel/rcu/Kconfig.debug
index 4aa02eee8f6c..b5f3545b0cfb 100644
--- a/kernel/rcu/Kconfig.debug
+++ b/kernel/rcu/Kconfig.debug
@@ -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
diff --git a/kernel/rcu/rcu.h b/kernel/rcu/rcu.h
index 00ddc92c5774..c5746202e124 100644
--- a/kernel/rcu/rcu.h
+++ b/kernel/rcu/rcu.h
@@ -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
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index fbb3e6247443..6b0663801a82 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -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))