linux-kernel - Re: [ RFC, PATCH 1/5 ] CPU controller

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Message-Id: <20060804003528.da3722b3.akpm@osdl.org>
Date:	Fri, 4 Aug 2006 00:35:28 -0700
From:	Andrew Morton <akpm@...l.org>
To:	vatsa@...ibm.com
Cc:	mingo@...e.hu, nickpiggin@...oo.com.au, sam@...ain.net,
	linux-kernel@...r.kernel.org, dev@...nvz.org, efault@....de,
	balbir@...ibm.com, sekharan@...ibm.com, nagar@...son.ibm.com,
	haveblue@...ibm.com, pj@....com
Subject: Re: [ RFC, PATCH 1/5 ] CPU controller - base changes

On Fri, 4 Aug 2006 10:39:32 +0530
Srivatsa Vaddagiri <vatsa@...ibm.com> wrote:

> +/* runqueue used for every task-group */
> +struct task_grp_rq {
> +	struct prio_array arrays[2];
> +	struct prio_array *active, *expired, *rq_array;
> +	unsigned long expired_timestamp;
> +	unsigned int ticks;
> +	int prio;	/* Priority of the task-group */
> +	struct list_head list;
> +};
> +
> +static DEFINE_PER_CPU(struct task_grp_rq, init_tg_rq);

That's another 4.5kbytes/cpu of our precious per-cpu memory.  Is it feasible to make this
dependent upon CONFIG_CPUMETER?
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