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rcu: Make rcutorture emit online failures if verbose

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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@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
This commit is contained in:
Paul E. McKenney 2013-06-21 06:24:56 -07:00
parent ef47db8e99
commit 7a6a41073c
1 changed files with 7 additions and 1 deletions
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8
kernel/rcutorture.c
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@ -1434,7 +1434,13 @@ rcu_torture_onoff(void *arg)
torture_type, cpu); torture_type, cpu);
starttime = jiffies; starttime = jiffies;
n_online_attempts++; 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) if (verbose)
pr_alert("%s" TORTURE_FLAG pr_alert("%s" TORTURE_FLAG
"rcu_torture_onoff task: onlined %d\n", "rcu_torture_onoff task: onlined %d\n",