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path: root/drivers/cpuidle/governors/menu.c
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Diffstat (limited to 'drivers/cpuidle/governors/menu.c')
-rw-r--r--drivers/cpuidle/governors/menu.c27
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c
index f53a929bd2bd..267982e471e0 100644
--- a/drivers/cpuidle/governors/menu.c
+++ b/drivers/cpuidle/governors/menu.c
@@ -295,6 +295,7 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev,
unsigned int expected_interval;
unsigned long nr_iowaiters, cpu_load;
int resume_latency = dev_pm_qos_raw_read_value(device);
+ ktime_t delta_next;
if (data->needs_update) {
menu_update(drv, dev);
@@ -312,7 +313,7 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev,
}
/* determine the expected residency time, round up */
- data->next_timer_us = ktime_to_us(tick_nohz_get_sleep_length());
+ data->next_timer_us = ktime_to_us(tick_nohz_get_sleep_length(&delta_next));
get_iowait_load(&nr_iowaiters, &cpu_load);
data->bucket = which_bucket(data->next_timer_us, nr_iowaiters);
@@ -396,9 +397,31 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev,
* expected idle duration is shorter than the tick period length.
*/
if ((drv->states[idx].flags & CPUIDLE_FLAG_POLLING) ||
- expected_interval < TICK_USEC)
+ expected_interval < TICK_USEC) {
+ unsigned int delta_next_us = ktime_to_us(delta_next);
+
*stop_tick = false;
+ if (!tick_nohz_tick_stopped() && idx > 0 &&
+ drv->states[idx].target_residency > delta_next_us) {
+ /*
+ * The tick is not going to be stopped and the target
+ * residency of the state to be returned is not within
+ * the time until the next timer event including the
+ * tick, so try to correct that.
+ */
+ for (i = idx - 1; i >= 0; i--) {
+ if (drv->states[i].disabled ||
+ dev->states_usage[i].disable)
+ continue;
+
+ idx = i;
+ if (drv->states[i].target_residency <= delta_next_us)
+ break;
+ }
+ }
+ }
+
data->last_state_idx = idx;
return data->last_state_idx;