Commit-ID: 32071141b2448458479932fe726ce892cbe1b4e4
Gitweb: http://git.kernel.org/tip/32071141b2448458479932fe726ce892cbe1b4e4
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Sat, 25 Mar 2017 11:34:42 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Tue, 18 Apr 2017 11:38:22 -0700
srcutorture: Print Tiny SRCU reader statistics
The srcu_torture_stats() function is adapted to the specific srcu_struct
layout traditionally used by SRCU. This commit therefore adds support
for Tiny SRCU.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
kernel/rcu/rcutorture.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 98591e1..9cbb8a7 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -559,11 +559,12 @@ static void srcu_torture_barrier(void)
static void srcu_torture_stats(void)
{
-#ifdef CONFIG_TREE_SRCU
- int cpu;
- int idx = srcu_ctlp->completed & 0x1;
+ int __maybe_unused cpu;
+ int idx;
- pr_alert("%s%s per-CPU(idx=%d):",
+#ifdef CONFIG_TREE_SRCU
+ idx = srcu_ctlp->completed & 0x1;
+ pr_alert("%s%s Tree SRCU per-CPU(idx=%d):",
torture_type, TORTURE_FLAG, idx);
for_each_possible_cpu(cpu) {
unsigned long l0, l1;
@@ -588,6 +589,12 @@ static void srcu_torture_stats(void)
pr_cont(" %d(%ld,%ld)", cpu, c0, c1);
}
pr_cont("\n");
+#elif defined(CONFIG_TINY_SRCU)
+ idx = READ_ONCE(srcu_ctlp->srcu_idx) & 0x1;
+ pr_alert("%s%s Tiny SRCU per-CPU(idx=%d): (%d,%d)\n",
+ torture_type, TORTURE_FLAG, idx,
+ READ_ONCE(srcu_ctlp->srcu_lock_nesting[!idx]),
+ READ_ONCE(srcu_ctlp->srcu_lock_nesting[idx]));
#endif
}
--
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