Shortcut to remove rq->cpu_load[load_idx] effect in scheduler. In five load idx, only busy_idx, idle_idx are not zero. Newidle_idx, wake_idx and fork_idx are all zero in all archs.
So, change the idx to zero here can fully remove load_idx effect.
Signed-off-by: Alex Shi alex.shi@linaro.org --- kernel/sched/fair.c | 30 +----------------------------- 1 file changed, 1 insertion(+), 29 deletions(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 7e9bd0b..1d8a908 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -5506,34 +5506,6 @@ static inline void init_sd_lb_stats(struct sd_lb_stats *sds) }; }
-/** - * get_sd_load_idx - Obtain the load index for a given sched domain. - * @sd: The sched_domain whose load_idx is to be obtained. - * @idle: The idle status of the CPU for whose sd load_idx is obtained. - * - * Return: The load index. - */ -static inline int get_sd_load_idx(struct sched_domain *sd, - enum cpu_idle_type idle) -{ - int load_idx; - - switch (idle) { - case CPU_NOT_IDLE: - load_idx = sd->busy_idx; - break; - - case CPU_NEWLY_IDLE: - load_idx = sd->newidle_idx; - break; - default: - load_idx = sd->idle_idx; - break; - } - - return load_idx; -} - static unsigned long default_scale_freq_power(struct sched_domain *sd, int cpu) { return SCHED_POWER_SCALE; @@ -5919,7 +5891,7 @@ static inline void update_sd_lb_stats(struct lb_env *env, struct sd_lb_stats *sd if (child && child->flags & SD_PREFER_SIBLING) prefer_sibling = 1;
- load_idx = get_sd_load_idx(env->sd, env->idle); + load_idx = 0;
do { struct sg_lb_stats *sgs = &tmp_sgs;