linux-kernel - Re: [RFC 4/8] Make clear description of putback_lru

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Message-ID: <BANLkTik2FTKgSSYkyP4XT4pkhOYvpjgSTA@mail.gmail.com>
Date:	Thu, 28 Apr 2011 08:20:32 +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 4/8] Make clear description of putback_lru_page

On Wed, Apr 27, 2011 at 5:11 PM, KAMEZAWA Hiroyuki
<kamezawa.hiroyu@...fujitsu.com> wrote:
> On Wed, 27 Apr 2011 01:25:21 +0900
> Minchan Kim <minchan.kim@...il.com> wrote:
>
>> Commonly, putback_lru_page is used with isolated_lru_page.
>> The isolated_lru_page picks the page in middle of LRU and
>> putback_lru_page insert the lru in head of LRU.
>> It means it could make LRU churning so we have to be very careful.
>> Let's clear description of putback_lru_page.
>>
>> 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>
>
> seems good...
> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
>
> But is there consensus which side of LRU is tail? head?

I don't know. I used to think it's head.
If other guys raise a concern as well, let's talk about it. :)
Thanks

> I always need to revisit codes when I see a word head/tail....
>
>
>



-- 
Kind regards,
Minchan Kim
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