linux-kernel - Re: [PATCH] vmscan: move referenced VM

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Message-ID: <AANLkTinWp-M4S5EXz6-xJvHAnzdk96_5+d2OJVjCycsm@mail.gmail.com>
Date:	Mon, 25 Oct 2010 07:52:47 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	Mandeep Singh Baines <msb@...omium.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Rik van Riel <riel@...hat.com>, Mel Gorman <mel@....ul.ie>,
	Johannes Weiner <hannes@...xchg.org>,
	Wu Fengguang <fengguang.wu@...el.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, wad@...omium.org,
	olofj@...omium.org, Shaohua Li <shaohua.li@...el.com>
Subject: Re: [PATCH] vmscan: move referenced VM_EXEC pages to active list

On Sat, Oct 23, 2010 at 7:51 AM, Mandeep Singh Baines <msb@...omium.org> wrote:
> In commit 64574746, "vmscan: detect mapped file pages used only once",
> Johannes Weiner, added logic to page_check_reference to cycle again
> used once pages.
>
> In commit 8cab4754, "vmscan: make mapped executable pages the first
> class citizen", Wu Fengguang, added logic to shrink_active_list which
> protects file-backed VM_EXEC pages by keeping them in the active_list if
> they are referenced.
>
> This patch adds logic to move such pages from the inactive list to the
> active list immediately if they have been referenced. If a VM_EXEC page
> is seen as referenced during an inactive list scan, that reference must
> have occurred after the page was put on the inactive list. There is no
> need to wait for the page to be referenced again.
>
> Change-Id: I17c312e916377e93e5a92c52518b6c829f9ab30b
> Signed-off-by: Mandeep Singh Baines <msb@...omium.org>

It seems to be similar to http://www.spinics.net/lists/linux-mm/msg09617.html.
I don't know what it is going. Shaohua?



-- 
Kind regards,
Minchan Kim
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