[PATCH 1/4] cpuidle: teo: Ignore disabled idle states that are too deep

Rafael J. Wysocki
2019-10-10T21:34:21Z

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Prevent disabled CPU idle state with target residencies beyond the
anticipated idle duration from being taken into account by the TEO
governor.

Fixes: b26bf6ab716f ("cpuidle: New timer events oriented governor for tickless systems")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/cpuidle/governors/teo.c | 7 +++++++
1 file changed, 7 insertions(+)

Index: linux-pm/drivers/cpuidle/governors/teo.c
===================================================================
--- linux-pm.orig/drivers/cpuidle/governors/teo.c
+++ linux-pm/drivers/cpuidle/governors/teo.c
@@ -258,6 +258,13 @@ static int teo_select(struct cpuidle_dri

if (s->disabled || su->disable) {
/*
+ * Ignore disabled states with target residencies beyond
+ * the anticipated idle duration.
+ */
+ if (s->target_residency > duration_us)
+ continue;
+
+ /*
* If the "early hits" metric of a disabled state is
* greater than the current maximum, it should be taken
* into account, because it would be a mistake to select