linux-kernel - Re: [PATCH 16/18] sched: Avoid overloading CPUs on a preferred NUMA node

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Message-ID: <CAJd=RBAxApb2Hoz06_7Ry1Z-TSAWGp9QJCfLP5NPPm2kiUF+Bg@mail.gmail.com>
Date:	Tue, 16 Jul 2013 23:55:24 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	Mel Gorman <mgorman@...e.de>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...nel.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 16/18] sched: Avoid overloading CPUs on a preferred NUMA node

On Mon, Jul 15, 2013 at 11:20 PM, Mel Gorman <mgorman@...e.de> wrote:
> +
> +static int task_numa_find_cpu(struct task_struct *p, int nid)
> +{
> +       int node_cpu = cpumask_first(cpumask_of_node(nid));
[...]
>
> +       /* No harm being optimistic */
> +       if (idle_cpu(node_cpu))
> +               return node_cpu;
>
[...]
> +       for_each_cpu(cpu, cpumask_of_node(nid)) {
> +               dst_load = target_load(cpu, idx);
> +
> +               /* If the CPU is idle, use it */
> +               if (!dst_load)
> +                       return dst_cpu;
> +
Here you want cpu, instead of dst_cpu, I guess.
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