From 74cc13eae86b37283230bc793d3e9070320cfe65 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 21 Jun 2013 06:24:56 -0700 Subject: [PATCH] rcu: Make rcutorture emit online failures if verbose 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 --- kernel/rcutorture.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c index 257eba17c2fd..eb4f0f54f509 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", -- 2.39.5