linux-kernel - [PATCH 2/2] arm: multi_v7

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Message-Id: <1529016629-2948-2-git-send-email-daniel.diaz@linaro.org>
Date:   Thu, 14 Jun 2018 17:50:27 -0500
From:   Daniel Díaz <daniel.diaz@...aro.org>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     anders.roxell@...aro.org,
        Daniel Díaz <daniel.diaz@...aro.org>,
        Russell King <linux@...linux.org.uk>,
        Arnd Bergmann <arnd@...db.de>,
        Simon Horman <horms+renesas@...ge.net.au>,
        Stefan Agner <stefan@...er.ch>,
        Tony Lindgren <tony@...mide.com>,
        Eric Anholt <eric@...olt.net>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Marc Zyngier <marc.zyngier@....com>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 2/2] arm: multi_v7_defconfig: Enable KSM.

As per the documentation, Kernel Samepage Merging (available
since 2.6.32) is a memory-saving de-duplication feature,
enabled by CONFIG_KSM=y and activated via sysfs. More
information can be found here:
  https://www.kernel.org/doc/Documentation/vm/ksm.txt

When enabled in the kernel, the default is to not do anything
at all, until it is activated at run-time with:
  echo 1 > /sys/kernel/mm/ksm/run

Signed-off-by: Daniel Díaz <daniel.diaz@...aro.org>
---
 arch/arm/configs/multi_v7_defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 7e1c543..79eedf4d 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -133,6 +133,7 @@ CONFIG_SMP=y
 CONFIG_NR_CPUS=16
 CONFIG_HIGHPTE=y
 CONFIG_CMA=y
+CONFIG_KSM=y
 CONFIG_SECCOMP=y
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
-- 
2.7.4