diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/fair.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index f9d0edd6828d..f1b4db36c23b 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -11970,12 +11970,25 @@ static inline void update_sg_lb_stats(struct lb_env *env, continue; if (sd_flags & SD_ASYM_CPUCAPACITY) { - /* Check for a misfit task on the cpu */ - if (sgs->group_misfit_task_load < rq->misfit_task_load) { - sgs->group_misfit_task_load = rq->misfit_task_load; - + if (rq->misfit_task_load) { + /* + * Always mark the root domain overloaded so big + * CPUs can pick up misfit tasks via newly idle + * balance. + */ if (balancing_at_rd) *sg_overloaded = 1; + + /* + * Only account misfit load if @dst_cpu can + * help; otherwise, the group may be classified + * as misfit_task and update_sd_pick_busiest() + * will skip it. + */ + if (capacity_greater(capacity_of(env->dst_cpu), + group->sgc->max_capacity) && + (sgs->group_misfit_task_load < rq->misfit_task_load)) + sgs->group_misfit_task_load = rq->misfit_task_load; } } else if (env->idle && sched_reduced_capacity(rq, env->sd)) { /* Check for a task running on a CPU with reduced capacity */ |