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Date: Mon, 7 Jul 2014 10:12:24 +0100
From: Will Deacon <will.deacon@arm.com>
Subject: Re: [PATCH v10 6/7] ARM: add pmd_[dirty|mkclean] for THP
Message-ID: <20140707091223.GC3145@arm.com>
References: <1404694438-10272-1-git-send-email-minchan@kernel.org>
 <1404694438-10272-7-git-send-email-minchan@kernel.org>
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Sender: owner-linux-mm@kvack.org
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To: Minchan Kim <minchan@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linux-mm@kvack.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>, Catalin Marinas <Catalin.Marinas@arm.com>, Steve Capper <steve.capper@linaro.org>, Russell King <linux@arm.linux.org.uk>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>

On Mon, Jul 07, 2014 at 01:53:57AM +0100, Minchan Kim 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.
> 
> This patch adds pmd_dirty and pmd_mkclean for THP page MADV_FREE
> support.

Looks fine to me, but it would be good if Steve can take a look too.

BTW: the subject of the patch says 'ARM:' but this only affects arm64. Is
there a corresponding patch for arch/arm/ too?

Will

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