linux-kernel - Re: [PATCH] x86, numa: seperate alloc_numa_distance from numa_reset

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Date:	Thu, 17 Feb 2011 00:44:24 +0300
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Yinghai Lu <yinghai@...nel.org>
CC:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>, Tejun Heo <tj@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86, numa: seperate alloc_numa_distance from numa_reset_distance.

On 02/16/2011 11:57 PM, Yinghai Lu wrote:
>
> alloc code is much bigger the setting self.
>
...
> +
> +	numa_distance = __va(phys);
> +	numa_distance_cnt = cnt;
> +
> +	/* fill with the default distances */
> +	for (i = 0; i<  cnt; i++)
> +		for (j = 0; j<  cnt; j++)
> +			numa_distance[i * cnt + j] = i == j ?
> +				LOCAL_DISTANCE : REMOTE_DISTANCE;
> +	printk(KERN_DEBUG "NUMA: Initialized distance table, cnt=%d\n", cnt);
> +}
> +

   Hi Yinghai, btw would it be convenient to use node_distance() helper here
(since this snippet is touched anyway and there is a big merging of numa
  code), ie

	/* fill with the default distances */
	for (i = 0; i < cnt; i++)
		for (j = 0; j <  cnt; j++)
			numa_distance[i * cnt + j] = node_distance(i, j);
	
though it should be patch on top of yours to not mix with plain code move
-- 
     Cyrill
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