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Subject[PATCH] cpuidle: Always stop scheduler tick on adaptive-tick CPUs
From: Rafael J. Wysocki <>

Running the scheduler tick on idle adaptive-tick CPUs is not useful
and it may also be not expected by users (as reported by Thomas), so
add a check to cpuidle_idle_call() to always stop the tick on them
regardless of the idle duration predicted by the governor.

Fixes: 554c8aa8ecad ("sched: idle: Select idle state before stopping the tick")
Reported-by: Thomas Lindroth <>
Tested-by: Thomas Lindroth <>
Signed-off-by: Rafael J. Wysocki <>
kernel/sched/idle.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

Index: linux-pm/kernel/sched/idle.c
--- linux-pm.orig/kernel/sched/idle.c
+++ linux-pm/kernel/sched/idle.c
@@ -191,7 +191,8 @@ static void cpuidle_idle_call(void)
next_state = cpuidle_select(drv, dev, &stop_tick);

- if (stop_tick || tick_nohz_tick_stopped())
+ if (stop_tick || tick_nohz_tick_stopped() ||
+ !housekeeping_cpu(dev->cpu, HK_FLAG_TICK))

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