[PATCH tip/core/rcu 5/5] rcu: Make rcutorture emit online failures if verbose
From: Paul E. McKenney
Date: Mon Aug 19 2013 - 22:51:29 EST
From: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>
Although rcutorture counts CPU-hotplug online failures, it does
not explicitly record which CPUs were having trouble coming online.
This commit therefore emits a console message when online failure occurs.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
---
kernel/rcutorture.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index 869dac2..a4a73d4 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -1434,7 +1434,13 @@ rcu_torture_onoff(void *arg)
torture_type, cpu);
starttime = jiffies;
n_online_attempts++;
- if (cpu_up(cpu) == 0) {
+ ret = cpu_up(cpu);
+ if (ret) {
+ if (verbose)
+ pr_alert("%s" TORTURE_FLAG
+ "rcu_torture_onoff task: online %d failed: errno %d\n",
+ torture_type, cpu, ret);
+ } else {
if (verbose)
pr_alert("%s" TORTURE_FLAG
"rcu_torture_onoff task: onlined %d\n",
--
1.8.1.5
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