From 083645f20388e2b6f075f49209a66c068f64f825 Mon Sep 17 00:00:00 2001
From: Balazs Gerofi <bgerofi@riken.jp>
Date: Fri, 14 Oct 2016 21:25:56 +0900
Subject: [PATCH] mcreboot: purge Linux caches before reserving IHK resources

---
 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 9b8783a6..8645f123 100644
--- a/arch/x86/tools/mcreboot-smp-x86.sh.in
+++ b/arch/x86/tools/mcreboot-smp-x86.sh.in
@@ -131,6 +131,9 @@ if [ "`lsmod | grep ihk`" == "" ]; then
         if ! insmod ${KMODDIR}/ihk.ko; then echo "error: loading ihk" >&2; exit 1; fi;
 fi
 
+# Drop Linux caches to free memory
+sync && echo 3 > /proc/sys/vm/drop_caches
+
 # Load IHK-SMP if not loaded and reserve CPUs and memory
 if [ "`lsmod | grep ihk_smp_x86`" == "" ]; then
         ihk_irq=""