Commit fa116ea3 authored by Heiko Carstens's avatar Heiko Carstens Committed by Ingo Molnar

nohz: no softirq pending warnings for offline cpus

Impact: remove false positive warning

After a cpu was taken down during cpu hotplug (read: disabled for interrupts)
it still might have pending softirqs. However take_cpu_down makes sure
that the idle task will run next instead of ksoftirqd on the taken down cpu.
The idle task will call tick_nohz_stop_sched_tick which might warn about
pending softirqs just before the cpu kills itself completely.

However the pending softirqs on the dead cpu aren't a problem because they
will be moved to an online cpu during CPU_DEAD handling.

So make sure we warn only for online cpus.
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 6c34bc29
...@@ -247,7 +247,7 @@ void tick_nohz_stop_sched_tick(int inidle) ...@@ -247,7 +247,7 @@ void tick_nohz_stop_sched_tick(int inidle)
if (need_resched()) if (need_resched())
goto end; goto end;
if (unlikely(local_softirq_pending())) { if (unlikely(local_softirq_pending() && cpu_online(cpu))) {
static int ratelimit; static int ratelimit;
if (ratelimit < 10) { if (ratelimit < 10) {
......
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