From: Gerald Schaefer <gerald.schaefer@de.ibm.com>
To: Minchan Kim <minchan@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Michael Kerrisk <mtk.manpages@gmail.com>,
Linux API <linux-api@vger.kernel.org>,
Hugh Dickins <hughd@google.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Rik van Riel <riel@redhat.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Mel Gorman <mgorman@suse.de>, Jason Evans <je@fb.com>,
Zhang Yanfei <zhangyanfei@cn.fujitsu.com>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Dominik Dingel <dingel@linux.vnet.ibm.com>,
Christian Borntraeger <borntraeger@de.ibm.com>,
linux-s390@vger.kernel.org
Subject: Re: [PATCH v10 5/7] s390: add pmd_[dirty|mkclean] for THP
Date: Mon, 7 Jul 2014 17:31:43 +0200 [thread overview]
Message-ID: <20140707173143.271bbd52@thinkpad> (raw)
In-Reply-To: <1404694438-10272-6-git-send-email-minchan@kernel.org>
On Mon, 7 Jul 2014 09:53:56 +0900
Minchan Kim <minchan@kernel.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@de.ibm.com>
> Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
> Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
> Cc: Dominik Dingel <dingel@linux.vnet.ibm.com>
> Cc: Christian Borntraeger <borntraeger@de.ibm.com>
> Cc: linux-s390@vger.kernel.org
> Signed-off-by: Minchan Kim <minchan@kernel.org>
> ---
> arch/s390/include/asm/pgtable.h | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
Acked-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
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next prev parent reply other threads:[~2014-07-07 15:31 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-07 0:53 [PATCH v10 0/7] MADV_FREE support Minchan Kim
2014-07-07 0:53 ` [PATCH v10 1/7] mm: support madvise(MADV_FREE) Minchan Kim
2014-07-07 10:41 ` Kirill A. Shutemov
2014-07-08 0:36 ` Minchan Kim
2014-07-08 3:54 ` Zhang Yanfei
2014-07-08 4:45 ` Minchan Kim
2014-07-07 0:53 ` [PATCH v10 2/7] x86: add pmd_[dirty|mkclean] for THP Minchan Kim
2014-07-07 10:44 ` Kirill A. Shutemov
2014-07-07 0:53 ` [PATCH v10 3/7] sparc: " Minchan Kim
2014-07-07 0:53 ` [PATCH v10 4/7] powerpc: " Minchan Kim
2014-07-07 0:53 ` [PATCH v10 5/7] s390: " Minchan Kim
2014-07-07 15:31 ` Gerald Schaefer [this message]
2014-07-07 0:53 ` [PATCH v10 6/7] ARM: " Minchan Kim
2014-07-07 9:12 ` Will Deacon
2014-07-07 9:22 ` Steve Capper
2014-07-08 1:09 ` Minchan Kim
2014-07-07 0:53 ` [PATCH v10 7/7] mm: Don't split THP page when syscall is called Minchan Kim
2014-07-07 11:13 ` Kirill A. Shutemov
2014-07-08 1:30 ` Minchan Kim
2014-07-08 6:10 ` Minchan Kim
2014-07-08 9:48 ` Kirill A. Shutemov
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