From: "Paul E. McKenney" <paul...@linux.vnet.ibm.com>
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 <paul...@linux.vnet.ibm.com>
---
kernel/rcutorture.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index 7d42d13..15bec39 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -1437,7 +1437,13 @@ rcu_torture_onoff(void *arg)
torture_type, cpu);
starttime = jiffies;
n_online_attempts++;
- if (cpu_up(cpu) == 0) {
+ ret = cpu_up(cpu);
+ if (ret != 0) {
+ 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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