linux-kernel - Re: [PATCH 3/4] pagemap: export KPF

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Message-Id: <20120104155516.19535dc3.akpm@linux-foundation.org>
Date:	Wed, 4 Jan 2012 15:55:16 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Cc:	linux-mm@...ck.org, David Rientjes <rientjes@...gle.com>,
	Andi Kleen <andi@...stfloor.org>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] pagemap: export KPF_THP

On Wed, 21 Dec 2011 17:23:47 -0500
Naoya Horiguchi <n-horiguchi@...jp.nec.com> wrote:

> This flag shows that a given pages is a subpage of transparent hugepage.
> It helps us debug and test kernel by showing physical address of thp.
>
> ...
>
> --- 3.2-rc5.orig/include/linux/kernel-page-flags.h
> +++ 3.2-rc5/include/linux/kernel-page-flags.h
> @@ -30,6 +30,7 @@
>  #define KPF_NOPAGE		20
>  
>  #define KPF_KSM			21
> +#define KPF_THP			22
>  

Please also update and test Documentation/vm/page-types.c.
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