linux-kernel - Re: [PATCH 3/9] mm/rmap: factor lock function out of rmap_walk

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Date:	Mon, 02 Dec 2013 15:09:24 -0500
From:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
To:	Joonsoo Kim <iamjoonsoo.kim@....com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mgorman@...e.de>, Hugh Dickins <hughd@...gle.com>,
	Rik van Riel <riel@...hat.com>,
	Ingo Molnar <mingo@...nel.org>,
	Hillf Danton <dhillf@...il.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, Joonsoo Kim <js1304@...il.com>
Subject: Re: [PATCH 3/9] mm/rmap: factor lock function out of rmap_walk_anon()

On Thu, Nov 28, 2013 at 04:48:40PM +0900, Joonsoo Kim wrote:
> When we traverse anon_vma, we need to take a read-side anon_lock.
> But there is subtle difference in the situation so that we can't use
> same method to take a lock in each cases. Therefore, we need to make
> rmap_walk_anon() taking difference lock function.
> 
> This patch is the first step, factoring lock function for anon_lock out
> of rmap_walk_anon(). It will be used in case of removing migration entry
> and in default of rmap_walk_anon().
> 
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>

Reviewed-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
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