On Mon, Aug 11, 2014 at 10:02 PM, Xiao Guangrong
<xiaoguangr...@linux.vnet.ibm.com> wrote:
> @@ -722,9 +719,10 @@ static struct kvm_memslots *install_new_memslots(struct
> kvm *kvm,
> {
> struct kvm_memslots *old_memslots = kvm->memslots;
>
I think you want
slots->generation = old_memslots->generation;
here.
On the KVM_MR_DELETE path, install_new_memslots is called twice so this
patch introduces a short window of time where the generation number
actually decreases.
> - update_memslots(slots, new, kvm->memslots->generation);
> + update_memslots(slots, new);
> rcu_assign_pointer(kvm->memslots, slots);
> synchronize_srcu_expedited(&kvm->srcu);
> + slots->generation++;
>
> kvm_arch_memslots_updated(kvm);
>
> --
> 1.8.3.1
>
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