From: Joel Fernandes <joel@joelfernandes.org>
To: linux-kernel@vger.kernel.org
Cc: kernel-team@android.com,
"Joel Fernandes (Google)" <joel@joelfernandes.org>,
"Kirill A . Shutemov" <kirill@shutemov.name>,
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Yoshinori Sato <ysato@users.sourceforge.jp>
Subject: [PATCH -next-akpm 3/3] mm: select HAVE_MOVE_PMD in x86 for faster mremap
Date: Thu, 8 Nov 2018 10:12:01 -0800 [thread overview]
Message-ID: <20181108181201.88826-4-joelaf@google.com> (raw)
In-Reply-To: <20181108181201.88826-1-joelaf@google.com>
From: "Joel Fernandes (Google)" <joel@joelfernandes.org>
Moving page-tables at the PMD-level on x86 is known to be safe. Enable
this option so that we can do fast mremap when possible.
Suggested-by: Kirill A. Shutemov <kirill@shutemov.name>
Acked-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
---
arch/x86/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 605bec0c228f..05f3667de0d2 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -173,6 +173,7 @@ config X86
select HAVE_MEMBLOCK_NODE_MAP
select HAVE_MIXED_BREAKPOINTS_REGS
select HAVE_MOD_ARCH_SPECIFIC
+ select HAVE_MOVE_PMD
select HAVE_NMI
select HAVE_OPROFILE
select HAVE_OPTPROBES
--
2.19.1.930.g4563a0d9d0-goog
prev parent reply other threads:[~2018-11-08 18:12 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-08 18:11 [PATCH -next-akpm 0/3] Add support for fast mremap Joel Fernandes
2018-11-08 18:11 ` [PATCH -next-akpm 1/3] mm: treewide: remove unused address argument from pte_alloc functions (v2) Joel Fernandes
2018-11-08 18:12 ` [PATCH -next-akpm 2/3] mm: speed up mremap by 20x on large regions (v5) Joel Fernandes
2018-11-08 18:12 ` Joel Fernandes [this message]
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