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...art_pfn + len, end_pfn); > + spin_lock_irqsave(&zone->lock, flags); > + > + for_each_migratetype_order(order, t) { Why not do each order separately? This way you can use a single bit to pass a huge page to host. Not a requirement but hey. Alternatively (and maybe that is a better idea0 if you wanted to, you could just skip lone 4K pages. It's not clear that they are worth bothering with. Add a flag to start with some reasonably large order and go from there. > + list_for_each(curr, &zone->free_area[order].free_list[t]) { > + pfn = page_to_pfn(list_entry(curr...

...art_pfn + len, end_pfn); > + spin_lock_irqsave(&zone->lock, flags); > + > + for_each_migratetype_order(order, t) { Why not do each order separately? This way you can use a single bit to pass a huge page to host. Not a requirement but hey. Alternatively (and maybe that is a better idea0 if you wanted to, you could just skip lone 4K pages. It's not clear that they are worth bothering with. Add a flag to start with some reasonably large order and go from there. > + list_for_each(curr, &zone->free_area[order].free_list[t]) { > + pfn = page_to_pfn(list_entry(curr...

This patchset is for kernel and contains two parts of change to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by

This patchset is for kernel and contains two parts of change to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by