[PATCH v5 08/12] sched: move cfs task on a CPU with higher capacity
From: peterz@infradead.org (Peter Zijlstra)
Date: 2014-09-11 10:07:27
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On Tue, Aug 26, 2014 at 01:06:51PM +0200, Vincent Guittot wrote:
quoted hunk ↗ jump to hunk
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 18db43e..60ae1ce 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c@@ -6049,6 +6049,14 @@ static bool update_sd_pick_busiest(struct lb_env *env, return true; } + /* + * The group capacity is reduced probably because of activity from other + * sched class or interrupts which use part of the available capacity + */ + if ((sg->sgc->capacity_orig * 100) > (sgs->group_capacity * + env->sd->imbalance_pct)) + return true; + return false; }
This is unlikely to have worked as intended. You will never reach this, except on PowerPC >= 7. All other machines will have bailed at the !ASYM_PACKING check above this.