Re: KVM swapping with mmu notifiers

[Andrea Arcangeli <andrea-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

On Sun, Jan 20, 2008 at 05:16:03PM +0200, Avi Kivity wrote:
> Yes, it's supposed to work (we can't prevent userspace from doing it).

Hmm, I think we already prevent it, so I don't think I need to update
my swap code until the below is removed.

	/* Check for overlaps */
	r = -EEXIST;
	for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
		struct kvm_memory_slot *s = &kvm->memslots[i];

		if (s == memslot)
			continue;
		if (!((base_gfn + npages <= s->base_gfn) ||
		      (base_gfn >= s->base_gfn + s->npages)))
			goto out_free;
	}

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