From: Sasha Levin <levinsasha928@gmail.com>
Date: Sat, 2 Jul 2011 23:52:09 +0000 (+0300)
Subject: kvm tools: Advise memory allocated for guest RAM as KSM mergable
X-Git-Tag: next-20110824~3^2~147
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7ba127ff0905ef6f6abb5cab378ec28cd03a49ef;p=karo-tx-linux.git

kvm tools: Advise memory allocated for guest RAM as KSM mergable

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
---

diff --git a/tools/kvm/kvm.c b/tools/kvm/kvm.c
index 23d31a31aae7..2f5d633d384f 100644
--- a/tools/kvm/kvm.c
+++ b/tools/kvm/kvm.c
@@ -346,6 +346,8 @@ struct kvm *kvm__init(const char *kvm_dev, u64 ram_size, const char *name)
 	if (kvm->ram_start == MAP_FAILED)
 		die("out of memory");
 
+	madvise(kvm->ram_start, kvm->ram_size, MADV_MERGEABLE);
+
 	ret = ioctl(kvm->vm_fd, KVM_CREATE_IRQCHIP);
 	if (ret < 0)
 		die_perror("KVM_CREATE_IRQCHIP ioctl");