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cpuidle: teo: Ignore disabled idle states that are too deep 

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

Fixes: b26bf6ab71 ("cpuidle: New timer events oriented governor for tickless systems")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: 5.1+ <stable@vger.kernel.org> # 5.1+
This commit is contained in:
Rafael J. Wysocki 2019-10-10 23:32:17 +02:00
parent 4f5cafb5cb
commit 069ce2ef1a
1 changed files with 7 additions and 0 deletions
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7
drivers/cpuidle/governors/teo.c
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@ -257,6 +257,13 @@ static int teo_select(struct cpuidle_driver *drv, struct cpuidle_device *dev,
struct cpuidle_state_usage *su = &dev->states_usage[i];
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