Messages in this thread Patch in this message | | | From | "Paul E. McKenney" <> | Subject | [PATCH tip/core/rcu 06/14] torture: Stop onoff task if there is only one cpu | Date | Wed, 15 Jun 2016 15:09:35 -0700 |
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From: Boqun Feng <boqun.feng@gmail.com>
If the whole system has only one cpu, that cpu won't be able to be offlined, so there is no need onoff task is stil running.
Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> --- kernel/torture.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/kernel/torture.c b/kernel/torture.c index fb39a06bbef5..75961b3decfe 100644 --- a/kernel/torture.c +++ b/kernel/torture.c @@ -194,6 +194,12 @@ torture_onoff(void *arg) for_each_online_cpu(cpu) maxcpu = cpu; WARN_ON(maxcpu < 0); + + if (maxcpu == 0) { + VERBOSE_TOROUT_STRING("Only one CPU, so CPU-hotplug testing is disabled"); + goto stop; + } + if (onoff_holdoff > 0) { VERBOSE_TOROUT_STRING("torture_onoff begin holdoff"); schedule_timeout_interruptible(onoff_holdoff); @@ -209,6 +215,8 @@ torture_onoff(void *arg) &sum_online, &min_online, &max_online); schedule_timeout_interruptible(onoff_interval); } + +stop: torture_kthread_stopping("torture_onoff"); return 0; } -- 2.5.2
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