linux-kernel - Re: [PATCH v6, part3 15/16] mm: report available pages as "MemTotal" for each NUMA node

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Message-ID: <518FB1A5.8050303@gmail.com>
Date:	Sun, 12 May 2013 23:13:41 +0800
From:	Liu Jiang <liuj97@...il.com>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Jiang Liu <jiang.liu@...wei.com>,
	David Rientjes <rientjes@...gle.com>,
	Wen Congyang <wency@...fujitsu.com>,
	Mel Gorman <mgorman@...e.de>, Minchan Kim <minchan@...nel.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Michal Hocko <mhocko@...e.cz>,
	James Bottomley <james.bottomley@...senpartnership.com>,
	David Howells <dhowells@...hat.com>,
	Mark Salter <msalter@...hat.com>,
	Jianguo Wu <wujianguo@...wei.com>, linux-mm@...ck.org,
	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6, part3 15/16] mm: report available pages as "MemTotal"
 for each NUMA node

On Sun 12 May 2013 04:05:51 AM CST, Sergei Shtylyov wrote:
> Hello.
>
> On 05/11/2013 09:34 PM, Jiang Liu wrote:
>
>    I've noticed a small typo in the changelog.
>
>> As reported by https://bugzilla.kernel.org/show_bug.cgi?id=53501,
>> "MemTotal" from /proc/meminfo means memory pages managed by the buddy
>> system (managed_pages), but "MemTotal" from /sys/.../node/nodex/meminfo
>> means phsical pages present (present_pages) within the NUMA node.
>
>     s/phsical/physical/
Thanks Sergei, will fix it in next version.
Gerry

>
>> There's a difference between managed_pages and present_pages due to
>> bootmem allocator and reserved pages.
>>
>> And Documentation/filesystems/proc.txt says
>>      MemTotal: Total usable ram (i.e. physical ram minus a few reserved
>>                bits and the kernel binary code)
>>
>> So change /sys/.../node/nodex/meminfo to report available pages within
>> the node as "MemTotal".
>>
>> Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
>> Reported-by: sworddragon2@....com
>> Cc: Andrew Morton <akpm@...ux-foundation.org>
>> Cc: Mel Gorman <mgorman@...e.de>
>> Cc: Minchan Kim <minchan@...nel.org>
>> Cc: linux-mm@...ck.org
>> Cc: linux-kernel@...r.kernel.org
>
> WBR, Sergei
>


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