linux-kernel - Re: [PATCH 4/5] v2 Update sysfs node routines for new sysfs memory directories

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Date:	Fri, 16 Jul 2010 09:12:39 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Nathan Fontenot <nfont@...tin.ibm.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linuxppc-dev@...abs.org
Subject: Re: [PATCH 4/5] v2 Update sysfs node routines for new sysfs memory
 directories

On Thu, 15 Jul 2010 13:40:40 -0500
Nathan Fontenot <nfont@...tin.ibm.com> wrote:

> Update the node sysfs directory routines that create
> links to the memory sysfs directories under each node.
> This update makes the node code aware that a memory sysfs
> directory can cover multiple memory sections.
> 
> Signed-off-by: Nathan Fontenot <nfont@...tin.ibm.com>

Shouldn't "static int link_mem_sections(int nid)" be update ?
It does
 for (pfn = start_pfn; pfn < end_pfn; pfn += PAGES_PER_SECTION) {
        register..

Thanks,
-Kame


> ---
>  drivers/base/node.c |   12 ++++++++----
>  1 file changed, 8 insertions(+), 4 deletions(-)
> 
> Index: linux-2.6/drivers/base/node.c
> ===================================================================
> --- linux-2.6.orig/drivers/base/node.c	2010-07-15 09:54:06.000000000 -0500
> +++ linux-2.6/drivers/base/node.c	2010-07-15 09:56:16.000000000 -0500
> @@ -346,8 +346,10 @@
>  		return -EFAULT;
>  	if (!node_online(nid))
>  		return 0;
> -	sect_start_pfn = section_nr_to_pfn(mem_blk->phys_index);
> -	sect_end_pfn = sect_start_pfn + PAGES_PER_SECTION - 1;
> +
> +	sect_start_pfn = section_nr_to_pfn(mem_blk->start_phys_index);
> +	sect_end_pfn = section_nr_to_pfn(mem_blk->end_phys_index);
> +	sect_end_pfn += PAGES_PER_SECTION - 1;
>  	for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) {
>  		int page_nid;
>  
> @@ -383,8 +385,10 @@
>  	if (!unlinked_nodes)
>  		return -ENOMEM;
>  	nodes_clear(*unlinked_nodes);
> -	sect_start_pfn = section_nr_to_pfn(mem_blk->phys_index);
> -	sect_end_pfn = sect_start_pfn + PAGES_PER_SECTION - 1;
> +
> +	sect_start_pfn = section_nr_to_pfn(mem_blk->start_phys_index);
> +	sect_end_pfn = section_nr_to_pfn(mem_blk->end_phys_index);
> +	sect_end_pfn += PAGES_PER_SECTION - 1;
>  	for (pfn = sect_start_pfn; pfn <= sect_end_pfn; pfn++) {
>  		int nid;
>  
> 
> --
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