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Subject[PATCH 29/39] KVM: Allocate guest memory as MAP_PRIVATE, not MAP_SHARED
Date
From: Avi Kivity <avi@qumranet.com>

There is no reason to share internal memory slots with fork()ed instances.

Signed-off-by: Avi Kivity <avi@qumranet.com>
---
arch/x86/kvm/x86.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index bfc7c33..675d010 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4296,7 +4296,7 @@ int kvm_arch_set_memory_region(struct kvm *kvm,
userspace_addr = do_mmap(NULL, 0,
npages * PAGE_SIZE,
PROT_READ | PROT_WRITE,
- MAP_SHARED | MAP_ANONYMOUS,
+ MAP_PRIVATE | MAP_ANONYMOUS,
0);
up_write(&current->mm->mmap_sem);

--
1.6.0.1


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