From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gerald Schaefer <gerald.schaefer-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
Subject: Re: [PATCH v10 5/7] s390: add pmd_[dirty|mkclean] for THP
Date: Mon, 7 Jul 2014 17:31:43 +0200
Message-ID: <20140707173143.271bbd52@thinkpad>
References: <1404694438-10272-1-git-send-email-minchan@kernel.org>
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To: Minchan Kim <minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Andrew Morton <akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, Michael Kerrisk <mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Linux API <linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Hugh Dickins <hughd-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>, Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>, Rik van Riel <riel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, KOSAKI Motohiro <kosaki.motohiro-+CUm20s59erQFUHtdCDX3A@public.gmane.org>, Mel Gorman <mgorman-l3A5Bk7waGM@public.gmane.org>, Jason Evans <je-b10kYP2dOMg@public.gmane.org>, Zhang Yanfei <zhangyanfei-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>, "Kirill A. Shutemov" <kirill-oKw7cIdHH8eLwutG50LtGA@public.gmane.org>, Martin Schwidefsky <schwidefsky-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>, Heiko Carstens <heiko.carstens-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>, Dominik Dingel <dingel-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>, Christian Borntraeger <borntraeger-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>, linux-s390-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
List-Id: linux-api@vger.kernel.org

On Mon,  7 Jul 2014 09:53:56 +0900
Minchan Kim <minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:

> MADV_FREE needs pmd_dirty and pmd_mkclean for detecting recent
> overwrite of the contents since MADV_FREE syscall is called for
> THP page but for s390 pmds only referenced bit is available
> because there is no free bit left in the pmd entry for the
> software dirty bit so this patch adds dumb pmd_dirty which
> returns always true by suggesting by Martin.
> 
> They finally find a solution in future.
> http://marc.info/?l=linux-api&m=140440328820808&w=2
> 
> Cc: Martin Schwidefsky <schwidefsky-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
> Cc: Heiko Carstens <heiko.carstens-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
> Cc: Gerald Schaefer <gerald.schaefer-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
> Cc: Dominik Dingel <dingel-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
> Cc: Christian Borntraeger <borntraeger-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>
> Cc: linux-s390-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> Signed-off-by: Minchan Kim <minchan-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> ---
>  arch/s390/include/asm/pgtable.h | 12 ++++++++++++
>  1 file changed, 12 insertions(+)

Acked-by: Gerald Schaefer <gerald.schaefer-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>