linux-kernel - Re: [patch 05/21] define page_file

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Message-Id: <20080229204230.670B.KOSAKI.MOTOHIRO@jp.fujitsu.com>
Date:	Fri, 29 Feb 2008 20:53:45 +0900
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Rik van Riel <riel@...hat.com>
Cc:	kosaki.motohiro@...fujitsu.com, linux-kernel@...r.kernel.org,
	Lee Schermerhorn <Lee.Schermerhorn@...com>, linux-mm@...ck.org
Subject: Re: [patch 05/21] define page_file_cache() function

Hi

> Index: linux-2.6.25-rc2-mm1/mm/swap_state.c
> ===================================================================
> --- linux-2.6.25-rc2-mm1.orig/mm/swap_state.c	2008-02-19 16:23:09.000000000 -0500
> +++ linux-2.6.25-rc2-mm1/mm/swap_state.c	2008-02-27 14:36:57.000000000 -0500
> @@ -82,6 +82,7 @@ int add_to_swap_cache(struct page *page,
>  		if (!error) {
>  			page_cache_get(page);
>  			SetPageSwapCache(page);
> +			SetPageSwapBacked(page);
>  			set_page_private(page, entry.val);
>  			total_swapcache_pages++;
>  			__inc_zone_page_state(page, NR_FILE_PAGES);

hmm,
What do you think NR_FILE_PAGES counted?
SetPageSwapBacked() and increase NR_FILE_PAGES is a bit strange.

but I am worried now.
because if change it, make a incompatibility... ;)


- kosaki


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