linux-kernel - Re: [RFC 5/8] compaction: remove active list counting

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Message-ID: <BANLkTim8B7R_9jtBOLS6F_OYJJMwgcG-0Q@mail.gmail.com>
Date:	Thu, 28 Apr 2011 08:42:28 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Christoph Lameter <cl@...ux.com>,
	Johannes Weiner <jweiner@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Mel Gorman <mgorman@...e.de>, Rik van Riel <riel@...hat.com>,
	Andrea Arcangeli <aarcange@...hat.com>
Subject: Re: [RFC 5/8] compaction: remove active list counting

On Wed, Apr 27, 2011 at 5:15 PM, KAMEZAWA Hiroyuki
<kamezawa.hiroyu@...fujitsu.com> wrote:
> On Wed, 27 Apr 2011 01:25:22 +0900
> Minchan Kim <minchan.kim@...il.com> wrote:
>
>> acct_isolated of compaction uses page_lru_base_type which returns only
>> base type of LRU list so it never returns LRU_ACTIVE_ANON or LRU_ACTIVE_FILE.
>> So it's pointless to add lru[LRU_ACTIVE_[ANON|FILE]] to get sum.
>>
>> Cc: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
>> Cc: Mel Gorman <mgorman@...e.de>
>> Cc: Rik van Riel <riel@...hat.com>
>> Cc: Andrea Arcangeli <aarcange@...hat.com>
>> Signed-off-by: Minchan Kim <minchan.kim@...il.com>
>
> I think some comments are necessary to explain why INACTIVE only.

As alternative, I can change page_lru_base_type with page_lru.
It's not hot path so I will do.

Thanks, Kame.

> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

-- 
Kind regards,
Minchan Kim
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