提交 c726099e 编写于 作者: D Daniel Lezcano 提交者: Ingo Molnar

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: NDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NPeter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1389008085-9069-9-git-send-email-daniel.lezcano@linaro.orgSigned-off-by: NIngo Molnar <mingo@kernel.org>
上级 208cb16b
......@@ -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
}
......
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