From 8e37e1a2a3295f5d99e6dbe99eca24eca7a034ef Mon Sep 17 00:00:00 2001 From: Alex Shi Date: Thu, 12 Jan 2017 21:27:02 +0800 Subject: [PATCH] cpuidle/menu: stop seeking deeper idle if current state is deep enough Obsolete commit 71abbbf856a0 (cpuidle: extend cpuidle and menu governor to handle dynamic states) wanted to introduce dynamic C-states, but that idea was dropped long ago. The nonsense deeper C-state checking remained, though. Since both target_residency and exit_latency are longer for deeper idle state, there's no need to waste CPU time on useless checks. Signed-off-by: Alex Shi Acked-by: Rik van Riel [ rjw: Subject & changelog ] Signed-off-by: Rafael J. Wysocki --- drivers/cpuidle/governors/menu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/cpuidle/governors/menu.c b/drivers/cpuidle/governors/menu.c index d9b5b93..07e36bb 100644 --- a/drivers/cpuidle/governors/menu.c +++ b/drivers/cpuidle/governors/menu.c @@ -357,9 +357,9 @@ static int menu_select(struct cpuidle_driver *drv, struct cpuidle_device *dev) if (s->disabled || su->disable) continue; if (s->target_residency > data->predicted_us) - continue; + break; if (s->exit_latency > latency_req) - continue; + break; data->last_state_idx = i; } -- 2.7.4