From: Daniel Lezcano Date: Mon, 6 Jan 2014 11:34:45 +0000 (+0100) Subject: sched: Factor out the on_null_domain() checks in trigger_load_balance() X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=c726099ec224be8078d91072207053ff9a1ad6fc;p=deliverable%2Flinux.git sched: Factor out the on_null_domain() checks in trigger_load_balance() The test on_null_domain is done twice in the trigger_load_balance function. Move the test at the begin of the function, so there is only one check. Signed-off-by: Daniel Lezcano Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/1389008085-9069-9-git-send-email-daniel.lezcano@linaro.org Signed-off-by: Ingo Molnar --- diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index d7220d124f16..b24b6cfde9aa 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -6878,11 +6878,13 @@ static inline int on_null_domain(struct rq *rq) void trigger_load_balance(struct rq *rq) { /* Don't need to rebalance while attached to NULL domain */ - if (time_after_eq(jiffies, rq->next_balance) && - likely(!on_null_domain(rq))) + if (unlikely(on_null_domain(rq))) + return; + + if (time_after_eq(jiffies, rq->next_balance)) raise_softirq(SCHED_SOFTIRQ); #ifdef CONFIG_NO_HZ_COMMON - if (nohz_kick_needed(rq) && likely(!on_null_domain(rq))) + if (nohz_kick_needed(rq)) nohz_balancer_kick(); #endif }