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Message-Id: <1448006568-16031-8-git-send-email-minchan@kernel.org>
Date: Fri, 20 Nov 2015 17:02:39 +0900
From: Minchan Kim <minchan@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
Michael Kerrisk <mtk.manpages@...il.com>,
linux-api@...r.kernel.org, Hugh Dickins <hughd@...gle.com>,
Johannes Weiner <hannes@...xchg.org>,
Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>,
KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
Jason Evans <je@...com>, Daniel Micay <danielmicay@...il.com>,
"Kirill A. Shutemov" <kirill@...temov.name>,
Shaohua Li <shli@...nel.org>, Michal Hocko <mhocko@...e.cz>,
yalin.wang2010@...il.com, Andy Lutomirski <luto@...capital.net>,
Minchan Kim <minchan@...nel.org>
Subject: [PATCH v4 07/16] x86: add pmd_[dirty|mkclean] for THP
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.
Signed-off-by: Minchan Kim <minchan@...nel.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---
arch/x86/include/asm/pgtable.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 867da5bbb4a3..b964d54300e1 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -267,6 +267,11 @@ static inline pmd_t pmd_mkold(pmd_t pmd)
return pmd_clear_flags(pmd, _PAGE_ACCESSED);
}
+static inline pmd_t pmd_mkclean(pmd_t pmd)
+{
+ return pmd_clear_flags(pmd, _PAGE_DIRTY);
+}
+
static inline pmd_t pmd_wrprotect(pmd_t pmd)
{
return pmd_clear_flags(pmd, _PAGE_RW);
--
1.9.1
--
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