From: Minchan Kim <minchan@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Michael Kerrisk <mtk.manpages@gmail.com>,
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>,
zhangyanfei@cn.fujitsu.com,
"Kirill A. Shutemov" <kirill@shutemov.name>,
Minchan Kim <minchan@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCH v16 2/7] x86: add pmd_[dirty|mkclean] for THP
Date: Mon, 1 Sep 2014 16:20:43 +0900 [thread overview]
Message-ID: <1409556048-5045-3-git-send-email-minchan@kernel.org> (raw)
In-Reply-To: <1409556048-5045-1-git-send-email-minchan@kernel.org>
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.
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Minchan Kim <minchan@kernel.org>
---
arch/x86/include/asm/pgtable.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index aa97a070f09f..2259de0ccd79 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -104,6 +104,11 @@ static inline int pmd_young(pmd_t pmd)
return pmd_flags(pmd) & _PAGE_ACCESSED;
}
+static inline int pmd_dirty(pmd_t pmd)
+{
+ return pmd_flags(pmd) & _PAGE_DIRTY;
+}
+
static inline int pte_write(pte_t pte)
{
return pte_flags(pte) & _PAGE_RW;
@@ -272,6 +277,11 @@ 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);
--
2.0.0
next prev parent reply other threads:[~2014-09-01 7:21 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-01 7:20 [PATCH v16 0/7] MADV_FREE support Minchan Kim
2014-09-01 7:20 ` [PATCH v16 1/7] mm: support madvise(MADV_FREE) Minchan Kim
2014-09-16 6:08 ` SeongJae Park
2014-09-19 6:17 ` Minchan Kim
2014-09-01 7:20 ` Minchan Kim [this message]
2014-09-01 7:20 ` [PATCH v16 3/7] sparc: add pmd_[dirty|mkclean] for THP Minchan Kim
2014-09-01 7:20 ` [PATCH v16 4/7] powerpc: " Minchan Kim
2014-09-01 7:20 ` [PATCH v16 5/7] arm: add pmd_mkclean " Minchan Kim
2014-09-01 7:20 ` [PATCH v16 6/7] arm64: add pmd_[dirty|mkclean] " Minchan Kim
2014-09-01 7:20 ` [PATCH v16 7/7] mm: Don't split THP page when syscall is called Minchan Kim
2014-09-11 23:10 ` [PATCH v16 0/7] MADV_FREE support Minchan Kim
2014-09-19 6:17 ` Minchan Kim
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