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[v2,7/8] kvm tools: Advise memory allocated for guest RAM as KSM mergable

Message ID 1309650731-5796-7-git-send-email-levinsasha928@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Sasha Levin July 2, 2011, 11:52 p.m. UTC 
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
---
 tools/kvm/kvm.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
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Patch

diff --git a/tools/kvm/kvm.c b/tools/kvm/kvm.c
index 23d31a3..2f5d633 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");