virtio_balloon: fix shrinker count
Instead of multiplying by page order, virtio balloon divided by page order. The result is that it can return 0 if there are a bit less than MAX_ORDER - 1 pages in use, and then shrinker scan won't be called. Cc: stable@vger.kernel.org Fixes: 71994620 ("virtio_balloon: replace oom notifier with shrinker") Signed-off-by: NWei Wang <wei.w.wang@intel.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Reviewed-by: NDavid Hildenbrand <david@redhat.com>
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