Date: Thu, 10 Oct 2013 12:55:06 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Weijie Yang <weijie.yang@samsung.com>
Cc: sjenning@linux.vnet.ibm.com, bob.liu@oracle.com, minchan@kernel.org,
        weijie.yang.kh@gmail.com, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, stable@vger.kernel.org,
        d.j.shin@samsung.com, heesub.shin@samsung.com,
        kyungmin.park@samsung.com, hau.chen@samsung.com,
        bifeng.tong@samsung.com, rui.xie@samsung.com
Subject: Re: [PATCH v3 3/3] mm/zswap: avoid unnecessary page scanning
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On Mon, 23 Sep 2013 16:21:49 +0800 Weijie Yang <weijie.yang@samsung.com> wrote:

> add SetPageReclaim before __swap_writepage so that page can be moved to the
> tail of the inactive list, which can avoid unnecessary page scanning as this
> page was reclaimed by swap subsystem before.
> 
> Signed-off-by: Weijie Yang <weijie.yang@samsung.com>
> Reviewed-by: Bob Liu <bob.liu@oracle.com>
> Cc: Minchan Kim <minchan@kernel.org>
> Cc: stable@vger.kernel.org
> Acked-by: Seth Jennings <sjenning@linux.vnet.ibm.com>

As a minor(?) performance tweak, I don't believe this is suitable for
-stable backporting, so I took that out.  If you believe this was a
mistake, please explain why.


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