Re: [Qemu-devel] [PATCH v7 kernel 2/5] virtio-balloon: VIRTIO_BALLOON_F_CHUNK_TRANSFER

[Michael S. Tsirkin]

On Fri, Mar 03, 2017 at 01:40:27PM +0800, Wei Wang wrote:
> From: Liang Li <address@hidden>
> 
> Add a new feature bit, VIRTIO_BALLOON_F_CHUNK_TRANSFER. Please check
> the implementation patch commit for details about this feature.


better squash into next patch.

> Signed-off-by: Liang Li <address@hidden>
> Signed-off-by: Wei Wang <address@hidden>
> Cc: Michael S. Tsirkin <address@hidden>
> Cc: Paolo Bonzini <address@hidden>
> Cc: Cornelia Huck <address@hidden>
> Cc: Amit Shah <address@hidden>
> Cc: Dave Hansen <address@hidden>
> Cc: Andrea Arcangeli <address@hidden>
> Cc: David Hildenbrand <address@hidden>
> Cc: Liang Li <address@hidden>
> Cc: Wei Wang <address@hidden>
> ---
>  include/uapi/linux/virtio_balloon.h | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/include/uapi/linux/virtio_balloon.h 
> b/include/uapi/linux/virtio_balloon.h
> index 343d7dd..ed627b2 100644
> --- a/include/uapi/linux/virtio_balloon.h
> +++ b/include/uapi/linux/virtio_balloon.h
> @@ -34,10 +34,14 @@
>  #define VIRTIO_BALLOON_F_MUST_TELL_HOST      0 /* Tell before reclaiming 
> pages */
>  #define VIRTIO_BALLOON_F_STATS_VQ    1 /* Memory Stats virtqueue */
>  #define VIRTIO_BALLOON_F_DEFLATE_ON_OOM      2 /* Deflate balloon on OOM */
> +#define VIRTIO_BALLOON_F_CHUNK_TRANSFER      3 /* Transfer pages in chunks */
>  
>  /* Size of a PFN in the balloon interface. */
>  #define VIRTIO_BALLOON_PFN_SHIFT 12
>  
> +/* Shift to get a chunk size */
> +#define VIRTIO_BALLOON_CHUNK_SIZE_SHIFT 12
> +
>  struct virtio_balloon_config {
>       /* Number of pages host wants Guest to give up. */
>       __u32 num_pages;
> @@ -82,4 +86,12 @@ struct virtio_balloon_stat {
>       __virtio64 val;
>  } __attribute__((packed));
>  
> +/* Response header structure */
> +struct virtio_balloon_resp_hdr {
> +     u8 cmd;
> +     u8 flag;
> +     __le16 id; /* cmd id */
> +     __le32 data_len; /* Payload len in bytes */
> +};
> +
>  #endif /* _LINUX_VIRTIO_BALLOON_H */
> -- 
> 2.7.4