[PATCH -next 3/3] mm: select HAVE_MOVE_PMD in x86 for faster mremap

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From: Joel Fernandes <joel@joelfernandes•org>
To: linux-kernel@vger•kernel.org
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	"David S. Miller" <davem@davemloft•net>
Subject: [PATCH -next 3/3] mm: select HAVE_MOVE_PMD in x86 for faster mremap
Date: Fri,  2 Nov 2018 21:00:41 -0700	[thread overview]
Message-ID: <20181103040041.7085-4-joelaf@google.com> (raw)
In-Reply-To: <20181103040041.7085-1-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 ba7e3464ee92..48aef01a0bd1 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

next prev parent reply	other threads:[~2018-11-03  4:31 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-03  4:00 [PATCH -next 0/3] Add support for fast mremap Joel Fernandes
2018-11-03  4:00 ` [PATCH -next 1/3] mm: treewide: remove unused address argument from pte_alloc functions (v2) Joel Fernandes
2018-11-03 12:51   ` [PATCH -next v2 1/3] mm: treewide: remove unused address argument from pte_alloc functions SF Markus Elfring
2018-11-03  4:00 ` [PATCH -next 2/3] mm: speed up mremap by 20x on large regions (v4) Joel Fernandes
2018-11-03 16:45   ` kbuild test robot
2018-11-03 16:56   ` kbuild test robot
2018-11-03  4:00 ` Joel Fernandes [this message]
2018-11-03  9:15 ` [PATCH -next 0/3] Add support for fast mremap Richard Weinberger
2018-11-03  9:24   ` Anton Ivanov
2018-11-03 15:20     ` Joel Fernandes
2018-11-03 18:32     ` Joel Fernandes
2018-11-04  6:56       ` William Kucharski
2018-11-06  4:36         ` Joel Fernandes

find likely ancestor, descendant, or conflicting patches for this message:
( dfblob:ba7e3464ee9 dfblob:48aef01a0bd )
 OR (
bs:"[PATCH -next 3/3] mm: select HAVE_MOVE_PMD in x86 for faster mremap" )
	(help)

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