On Tuesday, July 16, 2019 10:41 PM, Hansen, Dave wrote: > Where is the page allocator integration? The set you linked to has 5 patches, > but only 4 were merged. This one is missing: > > https://lore.kernel.org/patchwork/patch/961038/ For some reason, we used the regular page allocation to get pages from the free list at that stage. This part could be improved by Alex or Nitesh's approach. The page address transmission from the balloon driver to the host device could reuse what's upstreamed there. I think you could add a new VIRTIO_BALLOON_CMD_xx for your usages. Best, Wei