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

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Message-Id: <20080826083243.232F.KOSAKI.MOTOHIRO@jp.fujitsu.com>
Date:	Tue, 26 Aug 2008 08:33:23 +0900
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Mike Travis <travis@....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
Subject: Re: [RFC][PATCH 2/2] quicklist shouldn't be proportional to # of CPUs

> > +	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);
> 
> Exactly!  And (many thanks to them!) the sparc maintainers have
> implemented a similar internal function definition for node_to_cpumask_ptr().

Can I think get your Ack?


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