KVM: Allocate guest memory as MAP_PRIVATE, not MAP_SHARED



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

Signed-off-by: Avi Kivity <avi@qumranet.com>

parent abb9e0b8

arch/x86/kvm/x86.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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);