linux-kernel - Re: [PATCH] mm: Add hook of freepage

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Message-Id: <20110207172806.dbca2cae.akpm@linux-foundation.org>
Date:	Mon, 7 Feb 2011 17:28:06 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Miklos Szeredi <mszeredi@...e.cz>
Cc:	Minchan Kim <minchan.kim@...il.com>, linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Rik van Riel <riel@...hat.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Mel Gorman <mel@....ul.ie>
Subject: Re: [PATCH] mm: Add hook of freepage

On Mon, 07 Feb 2011 10:37:01 +0100
Miklos Szeredi <mszeredi@...e.cz> wrote:

> On Mon, 2011-02-07 at 00:08 +0900, Minchan Kim wrote:
> > Recently, "Call the filesystem back whenever a page is removed from
> > the page cache(6072d13c)" added new freepage hook in page cache
> > drop function.
> > 
> > So, replace_page_cache_page should call freepage to support
> > page cleanup to fs.
> 
> Thanks Minchan for fixing this.

What's happening with mm-add-replace_page_cache_page-function.patch,
btw?  When last discussed nearly three weeks ago we had identified:

1) remove radix_tree_preload
2) single radix_tree_lookup_slot and replace radix tree slot
3) page accounting optimization if both pages are in same zone.

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