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authorJosh Triplett <josht@us.ibm.com>2006-10-04 02:17:15 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-04 07:55:31 -0700
commit20d2e4283a97665a3db78c60dfa342a0c7c1b180 (patch)
tree25bb664ab495fe4afcf9b2f85e438a437af0f85c
parente3033736581f125ba5fd6c0760e0d430d54fb5c0 (diff)
downloadlinux-20d2e4283a97665a3db78c60dfa342a0c7c1b180.tar.bz2
[PATCH] rcu: add rcu_sync torture type to rcutorture
Use the newly-generic synchronous deferred free function to implement torture testing for RCU using synchronize_rcu rather than the asynchronous call_rcu. 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>
-rw-r--r--Documentation/RCU/torture.txt7
-rw-r--r--kernel/rcutorture.c17
2 files changed, 19 insertions, 5 deletions
diff --git a/Documentation/RCU/torture.txt b/Documentation/RCU/torture.txt
index 2180ef93accc..6714b5361158 100644
--- a/Documentation/RCU/torture.txt
+++ b/Documentation/RCU/torture.txt
@@ -53,9 +53,10 @@ test_no_idle_hz Whether or not to test the ability of RCU to operate in
a kernel that disables the scheduling-clock interrupt to
idle CPUs. Boolean parameter, "1" to test, "0" otherwise.
-torture_type The type of RCU to test: "rcu" for the rcu_read_lock()
- API, "rcu_bh" for the rcu_read_lock_bh() API, and "srcu"
- for the "srcu_read_lock()" API.
+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, and "srcu" for the
+ "srcu_read_lock()" API.
verbose Enable debug printk()s. Default is disabled.
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index 6e2f0a8344c2..1c329df60bcc 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -58,7 +58,7 @@ static int stat_interval; /* Interval between stats, in seconds. */
static int verbose; /* Print more debug info. */
static int test_no_idle_hz; /* Test RCU's support for tickless idle CPUs. */
static int shuffle_interval = 5; /* Interval between shuffles (in sec)*/
-static char *torture_type = "rcu"; /* What to torture: rcu, rcu_bh, srcu. */
+static char *torture_type = "rcu"; /* What RCU implementation to torture. */
module_param(nreaders, int, 0);
MODULE_PARM_DESC(nreaders, "Number of RCU reader threads");
@@ -297,6 +297,19 @@ static void rcu_sync_torture_init(void)
INIT_LIST_HEAD(&rcu_torture_removed);
}
+static struct rcu_torture_ops rcu_sync_ops = {
+ .init = rcu_sync_torture_init,
+ .cleanup = NULL,
+ .readlock = rcu_torture_read_lock,
+ .readdelay = rcu_read_delay,
+ .readunlock = rcu_torture_read_unlock,
+ .completed = rcu_torture_completed,
+ .deferredfree = rcu_sync_torture_deferred_free,
+ .sync = synchronize_rcu,
+ .stats = NULL,
+ .name = "rcu_sync"
+};
+
/*
* Definitions for rcu_bh torture testing.
*/
@@ -439,7 +452,7 @@ static struct rcu_torture_ops srcu_ops = {
};
static struct rcu_torture_ops *torture_ops[] =
- { &rcu_ops, &rcu_bh_ops, &srcu_ops, NULL };
+ { &rcu_ops, &rcu_sync_ops, &rcu_bh_ops, &srcu_ops, NULL };
/*
* RCU torture writer kthread. Repeatedly substitutes a new structure