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Message-ID: <20150527223615.GA522@intel.com>
Date: Thu, 28 May 2015 06:36:16 +0800
From: Yuyang Du <yuyang.du@...el.com>
To: Vincent Guittot <vincent.guittot@...aro.org>
Cc: Ingo Molnar <mingo@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
linux-kernel <linux-kernel@...r.kernel.org>,
Paul Turner <pjt@...gle.com>,
Benjamin Segall <bsegall@...gle.com>,
Morten Rasmussen <morten.rasmussen@....com>,
Dietmar Eggemann <dietmar.eggemann@....com>,
arjan.van.de.ven@...el.com, Len Brown <len.brown@...el.com>,
rafael.j.wysocki@...el.com,
"fengguang.wu@...el.com" <fengguang.wu@...el.com>
Subject: Re: [PATCH v8 2/4] sched: Rewrite runnable load and utilization
average tracking
On Tue, May 26, 2015 at 06:06:23PM +0200, Vincent Guittot wrote:
> > + sa->util_sum = decay_load(u64(sa->util_sum), periods + 1);
>
> Brackets are missing around u64 to cast util_sum
>
My appology for this, and thank you, Vincent.
Sending the below patch here instead of sending the series.
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 2dd201e..a8fd7b9 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -2584,7 +2584,7 @@ static __always_inline int __update_load_avg(u64 now, int cpu,
delta %= 1024;
sa->load_sum = decay_load(sa->load_sum, periods + 1);
- sa->util_sum = decay_load(u64(sa->util_sum), periods + 1);
+ sa->util_sum = decay_load((u64)(sa->util_sum), periods + 1);
/* Efficiently calculate \sum (1..n_period) 1024*y^i */
contrib = __compute_runnable_contrib(periods);
--
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