From 4b6c2cca6eef9cc4a15350bf1c61839e12e08b84 Mon Sep 17 00:00:00 2001
From: Josh Triplett <josht@us.ibm.com>
Date: Wed, 4 Oct 2006 02:17:16 -0700
Subject: [PATCH] [PATCH] rcu: add sched torture type to rcutorture
Implement torture testing for the "sched" variant of RCU, which uses
preempt_disable, preempt_enable, and synchronize_sched.
Signed-off-by: Josh Triplett <josh@freedesktop.org>
Acked-by: Paul E. McKenney <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
Documentation/RCU/torture.txt | 5 +++--
kernel/rcutorture.c | 40 ++++++++++++++++++++++++++++++++++-
2 files changed, 42 insertions(+), 3 deletions(-)
diff --git a/Documentation/RCU/torture.txt b/Documentation/RCU/torture.txt
index cc4b1efe5ea85..25a3c3f7d378f 100644
--- a/Documentation/RCU/torture.txt
+++ b/Documentation/RCU/torture.txt
@@ -56,8 +56,9 @@ test_no_idle_hz Whether or not to test the ability of RCU to operate in
torture_type The type of RCU to test: "rcu" for the rcu_read_lock() API,
"rcu_sync" for rcu_read_lock() with synchronous reclamation,
"rcu_bh" for the rcu_read_lock_bh() API, "rcu_bh_sync" for
- rcu_read_lock_bh() with synchronous reclamation, and "srcu"
- for the "srcu_read_lock()" API.
+ rcu_read_lock_bh() with synchronous reclamation, "srcu" for
+ the "srcu_read_lock()" API, and "sched" for the use of
+ preempt_disable() together with synchronize_sched().
verbose Enable debug printk()s. Default is disabled.
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index 0f0ff1556b5d8..e2bda18f6f427 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -464,9 +464,47 @@ static struct rcu_torture_ops srcu_ops = {
.name = "srcu"
};
+/*
+ * Definitions for sched torture testing.
+ */
+
+static int sched_torture_read_lock(void)
+{
+ preempt_disable();
+ return 0;
+}
+
+static void sched_torture_read_unlock(int idx)
+{
+ preempt_enable();
+}
+
+static int sched_torture_completed(void)
+{
+ return 0;
+}
+
+static void sched_torture_synchronize(void)
+{
+ synchronize_sched();
+}
+
+static struct rcu_torture_ops sched_ops = {
+ .init = rcu_sync_torture_init,
+ .cleanup = NULL,
+ .readlock = sched_torture_read_lock,
+ .readdelay = rcu_read_delay, /* just reuse rcu's version. */
+ .readunlock = sched_torture_read_unlock,
+ .completed = sched_torture_completed,
+ .deferredfree = rcu_sync_torture_deferred_free,
+ .sync = sched_torture_synchronize,
+ .stats = NULL,
+ .name = "sched"
+};
+
static struct rcu_torture_ops *torture_ops[] =
{ &rcu_ops, &rcu_sync_ops, &rcu_bh_ops, &rcu_bh_sync_ops, &srcu_ops,
- NULL };
+ &sched_ops, NULL };
/*
* RCU torture writer kthread. Repeatedly substitutes a new structure
--
2.30.2