linux-kernel - Re: Subject: [PATCH V7 1/4] mm: frontswap: swap data structure changes

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Message-Id: <20110825143312.a6fe93d5.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Thu, 25 Aug 2011 14:33:12 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Dan Magenheimer <dan.magenheimer@...cle.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org, jeremy@...p.org,
	hughd@...gle.com, ngupta@...are.org, konrad.wilk@...cle.com,
	JBeulich@...ell.com, kurt.hackel@...cle.com, npiggin@...nel.dk,
	akpm@...ux-foundation.org, riel@...hat.com, hannes@...xchg.org,
	matthew@....cx, chris.mason@...cle.com,
	sjenning@...ux.vnet.ibm.com, jackdachef@...il.com,
	cyclonusj@...il.com
Subject: Re: Subject: [PATCH V7 1/4] mm: frontswap: swap data structure
 changes

On Tue, 23 Aug 2011 07:57:55 -0700
Dan Magenheimer <dan.magenheimer@...cle.com> wrote:

> From: Dan Magenheimer <dan.magenheimer@...cle.com>
> Subject: [PATCH V7 1/4] mm: frontswap: swap data structure changes
> 
> This first patch of four in the frontswap series makes available core
> swap data structures (swap_lock, swap_list and swap_info) that are
> needed by frontswap.c but we don't need to expose them to the dozens
> of files that include swap.h so we create a new swapfile.h just to
> extern-ify these.
> 
> Also add frontswap-related elements to swap_info_struct.  Frontswap_map
> points to vzalloc'ed one-bit-per-swap-page metadata that indicates
> whether the swap page is in frontswap or in the device and frontswap_pages
> counts how many pages are in frontswap.
> 
> [v7: rebase to 3.0-rc3]
> [v7: JBeulich@...ell.com: add new swap struct elements only if config'd]
> [v6: rebase to 3.0-rc1]
> [v5: no change from v4]
> [v4: rebase to 2.6.39]
> Signed-off-by: Dan Magenheimer <dan.magenheimer@...cle.com>
> Reviewed-by: Konrad Wilk <konrad.wilk@...cle.com>
> Acked-by: Jan Beulich <JBeulich@...ell.com>
> Acked-by: Seth Jennings <sjenning@...ux.vnet.ibm.com>
> Cc: Jeremy Fitzhardinge <jeremy@...p.org>
> Cc: Hugh Dickins <hughd@...gle.com>
> Cc: Johannes Weiner <hannes@...xchg.org>
> Cc: Nitin Gupta <ngupta@...are.org>
> Cc: Matthew Wilcox <matthew@....cx>
> Cc: Chris Mason <chris.mason@...cle.com>
> Cc: Rik Riel <riel@...hat.com>
> Cc: Andrew Morton <akpm@...ux-foundation.org>

Hmm....could you modify mm/swapfile.c and remove 'static' in the same patch ?


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