linux-kernel - Re: [RFC][PATCH 2/2] quicklist shouldn't be proportional to # of CPUs

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Message-Id: <20080821192130.22B5.KOSAKI.MOTOHIRO@jp.fujitsu.com>
Date:	Thu, 21 Aug 2008 19:22:11 +0900
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Miller <davem@...emloft.net>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	cl@...ux-foundation.org, tokunaga.keiich@...fujitsu.com,
	travis <travis@....com>
Subject: Re: [RFC][PATCH 2/2] quicklist shouldn't be proportional to # of CPUs


Sorry, following patch is crap.
please forget it.

I'll respin it soon.


> 
> ---
>  mm/quicklist.c |    9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
> 
> Index: b/mm/quicklist.c
> ===================================================================
> --- a/mm/quicklist.c
> +++ b/mm/quicklist.c
> @@ -26,7 +26,10 @@ DEFINE_PER_CPU(struct quicklist, quickli
>  static unsigned long max_pages(unsigned long min_pages)
>  {
>  	unsigned long node_free_pages, max;
> -	struct zone *zones = NODE_DATA(numa_node_id())->node_zones;
> +	int node = numa_node_id();
> +	struct zone *zones = NODE_DATA(node)->node_zones;
> +	int num_cpus_on_node;
> +	node_to_cpumask_ptr(cpumask_on_node, node);
>  
>  	node_free_pages =
>  #ifdef CONFIG_ZONE_DMA
> @@ -38,6 +41,10 @@ static unsigned long max_pages(unsigned 
>  		zone_page_state(&zones[ZONE_NORMAL], NR_FREE_PAGES);
>  
>  	max = node_free_pages / FRACTION_OF_NODE_MEM;
> +
> +	num_cpus_on_node = cpus_weight_nr(*cpumask_on_node);
> +	max /= num_cpus_on_node;
> +
>  	return max(max, min_pages);
>  }





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