linux-kernel - Re: [PATCH 4/4] pagemap: document KPF_THP and make page-types aware of it

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Date:	Thu, 29 Dec 2011 23:02:25 -0500
From:	KOSAKI Motohiro <kosaki.motohiro@...il.com>
To:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
CC:	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.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 4/4] pagemap: document KPF_THP and make page-types aware
 of it

(12/21/11 5:23 PM), Naoya Horiguchi wrote:
> page-types, which is a common user of pagemap, gets aware of thp
> with this patch. This helps system admins and kernel hackers know
> about how thp works.
> Here is a sample output of page-types over a thp:
> 
>    $ page-types -p<pid>  --raw --list
> 
>    voffset offset  len     flags
>    ...
>    7f9d40200       3f8400  1       ___U_lA____Ma_bH______t____________
>    7f9d40201       3f8401  1ff     ________________T_____t____________
> 
>                 flags      page-count       MB  symbolic-flags                     long-symbolic-flags
>    0x0000000000410000             511        1  ________________T_____t____________        compound_tail,thp
>    0x000000000040d868               1        0  ___U_lA____Ma_bH______t____________        uptodate,lru,active,mmap,anonymous,swapbacked,compound_head,thp
> 
> Signed-off-by: Naoya Horiguchi<n-horiguchi@...jp.nec.com>
> Acked-by: Wu Fengguang<fengguang.wu@...el.com>

Acked-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>


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