On Mon, 13 Jun 2016 15:25:32 +0200 Paolo Bonzini <[email protected]> wrote:
> The new created_vcpus field avoids possible races between enabling > capabilities and creating VCPUs. > > Signed-off-by: Paolo Bonzini <[email protected]> > --- > arch/s390/kvm/kvm-s390.c | 10 +++++----- > 1 file changed, 5 insertions(+), 5 deletions(-) > > @@ -426,7 +426,7 @@ static int kvm_s390_set_mem_control(struct kvm *kvm, > struct kvm_device_attr *att > ret = -EBUSY; > VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support"); > mutex_lock(&kvm->lock); > - if (atomic_read(&kvm->online_vcpus) == 0) { > + if (kvm->created_vcpus) { if (!kvm->created_vcpus) { > kvm->arch.use_cmma = 1; > ret = 0; > } > @@ -467,7 +467,7 @@ static int kvm_s390_set_mem_control(struct kvm *kvm, > struct kvm_device_attr *att > > ret = -EBUSY; > mutex_lock(&kvm->lock); > - if (atomic_read(&kvm->online_vcpus) == 0) { > + if (kvm->created_vcpus) { dito > /* gmap_alloc will round the limit up */ > struct gmap *new = gmap_alloc(current->mm, new_limit); >
