From f284a80656a5980f2cb42ee5a07d22cd5a2fc2c0 Mon Sep 17 00:00:00 2001
From: Masamichi Takagi <masamichi.takagi@riken.jp>
Date: Tue, 25 Oct 2016 16:35:43 +0900
Subject: [PATCH] Defrag memory in mcreboot.sh

Merge free physical pages to create large, physically contiguous
blocks with the following command.

    echo 1 > /proc/sys/vm/compact_memory
---
 arch/x86/tools/mcreboot-smp-x86.sh.in | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/tools/mcreboot-smp-x86.sh.in b/arch/x86/tools/mcreboot-smp-x86.sh.in
index b6253a30..56438fb1 100644
--- a/arch/x86/tools/mcreboot-smp-x86.sh.in
+++ b/arch/x86/tools/mcreboot-smp-x86.sh.in
@@ -144,6 +144,9 @@ fi
 # Drop Linux caches to free memory
 sync && echo 3 > /proc/sys/vm/drop_caches
 
+# Merge free memory areas into large, physically contigous ones
+echo 1 > /proc/sys/vm/compact_memory 2>/dev/null
+
 # Load IHK-SMP if not loaded and reserve CPUs and memory
 if [ "`lsmod | grep ihk_smp_x86`" == "" ]; then
         ihk_irq=""