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SubjectRe: [RFC, PATCH 2/2] qrcu: add rcutorture test
(with sparse annotations from Josh)

[PATCH 2/2] qrcu: add rcutorture test

Add rcutorture test for qrcu.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Josh Triplett <josh@freedesktop.org>

--- 19-rc6/include/linux/srcu.h~2_test 2006-11-30 04:32:42.000000000 +0300
+++ 19-rc6/include/linux/srcu.h 2006-12-03 00:03:18.000000000 +0300
@@ -64,8 +64,8 @@ struct qrcu_struct {
};

int init_qrcu_struct(struct qrcu_struct *qp);
-int qrcu_read_lock(struct qrcu_struct *qp);
-void qrcu_read_unlock(struct qrcu_struct *qp, int idx);
+int qrcu_read_lock(struct qrcu_struct *qp) __acquires(qp);
+void qrcu_read_unlock(struct qrcu_struct *qp, int idx) __releases(qp);
void synchronize_qrcu(struct qrcu_struct *qp);

/**
--- 19-rc6/kernel/rcutorture.c~2_test 2006-10-22 18:24:03.000000000 +0400
+++ 19-rc6/kernel/rcutorture.c 2006-12-03 00:03:18.000000000 +0300
@@ -465,6 +465,73 @@ static struct rcu_torture_ops srcu_ops =
};

/*
+ * Definitions for qrcu torture testing.
+ */
+
+static struct qrcu_struct qrcu_ctl;
+
+static void qrcu_torture_init(void)
+{
+ init_qrcu_struct(&qrcu_ctl);
+ rcu_sync_torture_init();
+}
+
+static void qrcu_torture_cleanup(void)
+{
+ synchronize_qrcu(&qrcu_ctl);
+ cleanup_qrcu_struct(&qrcu_ctl);
+}
+
+static int qrcu_torture_read_lock(void) __acquires(&qrcu_ctl)
+{
+ return qrcu_read_lock(&qrcu_ctl);
+}
+
+static void qrcu_torture_read_unlock(int idx) __releases(&qrcu_ctl)
+{
+ qrcu_read_unlock(&qrcu_ctl, idx);
+}
+
+static int qrcu_torture_completed(void)
+{
+ return qrcu_ctl.completed;
+}
+
+static void qrcu_torture_synchronize(void)
+{
+ synchronize_qrcu(&qrcu_ctl);
+}
+
+static int qrcu_torture_stats(char *page)
+{
+ int cnt = 0;
+ int idx = qrcu_ctl.completed & 0x1;
+
+ cnt += sprintf(&page[cnt], "%s%s per-CPU(idx=%d):",
+ torture_type, TORTURE_FLAG, idx);
+
+ cnt += sprintf(&page[cnt], " (%d,%d)",
+ atomic_read(qrcu_ctl.ctr + 0),
+ atomic_read(qrcu_ctl.ctr + 1));
+
+ cnt += sprintf(&page[cnt], "\n");
+ return cnt;
+}
+
+static struct rcu_torture_ops qrcu_ops = {
+ .init = qrcu_torture_init,
+ .cleanup = qrcu_torture_cleanup,
+ .readlock = qrcu_torture_read_lock,
+ .readdelay = srcu_read_delay,
+ .readunlock = qrcu_torture_read_unlock,
+ .completed = qrcu_torture_completed,
+ .deferredfree = rcu_sync_torture_deferred_free,
+ .sync = qrcu_torture_synchronize,
+ .stats = qrcu_torture_stats,
+ .name = "qrcu"
+};
+
+/*
* Definitions for sched torture testing.
*/

@@ -503,8 +570,8 @@ static struct rcu_torture_ops sched_ops
};

static struct rcu_torture_ops *torture_ops[] =
- { &rcu_ops, &rcu_sync_ops, &rcu_bh_ops, &rcu_bh_sync_ops, &srcu_ops,
- &sched_ops, NULL };
+ { &rcu_ops, &rcu_sync_ops, &rcu_bh_ops, &rcu_bh_sync_ops,
+ &srcu_ops, &qrcu_ops, &sched_ops, NULL };

/*
* RCU torture writer kthread. Repeatedly substitutes a new structure
-
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