From: "Michael S. Tsirkin" <mst@redhat.com>
To: Wei Wang <wei.w.wang@intel.com>
Cc: virtio-dev@lists.oasis-open.org, kvm@vger.kernel.org,
qemu-devel@nongnu.org, linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org, linux-mm@kvack.org,
Liang Li <liang.z.li@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@techsingularity.net>,
Paolo Bonzini <pbonzini@redhat.com>,
Cornelia Huck <cornelia.huck@de.ibm.com>,
Amit Shah <amit.shah@redhat.com>,
Dave Hansen <dave.hansen@intel.com>,
Andrea Arcangeli <aarcange@redhat.com>,
David Hildenbrand <david@redhat.com>,
Liang Li <liliang324@gmail.com>
Subject: Re: [PATCH v7 kernel 4/5] virtio-balloon: define flags and head for host request vq
Date: Wed, 8 Mar 2017 06:02:26 +0200 [thread overview]
Message-ID: <20170308060158-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <1488519630-89058-5-git-send-email-wei.w.wang@intel.com>
On Fri, Mar 03, 2017 at 01:40:29PM +0800, Wei Wang wrote:
> From: Liang Li <liang.z.li@intel.com>
>
> Define the flags and head struct for a new host request virtual
> queue. Guest can get requests from host and then responds to
> them on this new virtual queue.
> Host can make use of this virtqueue to request the guest to do
> some operations, e.g. drop page cache, synchronize file system,
> etc. The hypervisor can get some of guest's runtime information
> through this virtual queue too, e.g. the guest's unused page
> information, which can be used for live migration optimization.
>
> Signed-off-by: Liang Li <liang.z.li@intel.com>
> Signed-off-by: Wei Wang <wei.w.wang@intel.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Mel Gorman <mgorman@techsingularity.net>
> Cc: Michael S. Tsirkin <mst@redhat.com>
> Cc: Paolo Bonzini <pbonzini@redhat.com>
> Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
> Cc: Amit Shah <amit.shah@redhat.com>
> Cc: Dave Hansen <dave.hansen@intel.com>
> Cc: Andrea Arcangeli <aarcange@redhat.com>
> Cc: David Hildenbrand <david@redhat.com>
> Cc: Liang Li <liliang324@gmail.com>
> Cc: Wei Wang <wei.w.wang@intel.com>
I prefer this squashed into next patch makes review easier.
> ---
> include/uapi/linux/virtio_balloon.h | 22 ++++++++++++++++++++++
> 1 file changed, 22 insertions(+)
>
> diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virtio_balloon.h
> index ed627b2..630b0ef 100644
> --- a/include/uapi/linux/virtio_balloon.h
> +++ b/include/uapi/linux/virtio_balloon.h
> @@ -35,6 +35,7 @@
> #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 */
> +#define VIRTIO_BALLOON_F_HOST_REQ_VQ 4 /* Host request virtqueue */
>
> /* Size of a PFN in the balloon interface. */
> #define VIRTIO_BALLOON_PFN_SHIFT 12
> @@ -94,4 +95,25 @@ struct virtio_balloon_resp_hdr {
> __le32 data_len; /* Payload len in bytes */
> };
>
> +enum virtio_balloon_req_id {
> + /* Get unused page information */
> + BALLOON_GET_UNUSED_PAGES,
> +};
> +
> +enum virtio_balloon_flag {
> + /* Have more data for a request */
> + BALLOON_FLAG_CONT,
> + /* No more data for a request */
> + BALLOON_FLAG_DONE,
> +};
> +
> +struct virtio_balloon_req_hdr {
> + /* Used to distinguish different requests */
> + __le16 cmd;
> + /* Reserved */
> + __le16 reserved[3];
> + /* Request parameter */
> + __le64 param;
> +};
> +
> #endif /* _LINUX_VIRTIO_BALLOON_H */
> --
> 2.7.4
next prev parent reply other threads:[~2017-03-08 4:57 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-03 5:40 [PATCH v7 kernel 0/5] Extend virtio-balloon for fast (de)inflating & fast live migration Wei Wang
2017-03-03 5:40 ` [PATCH v7 kernel 1/5] virtio-balloon: rework deflate to add page to a list Wei Wang
2017-03-03 5:40 ` [PATCH v7 kernel 2/5] virtio-balloon: VIRTIO_BALLOON_F_CHUNK_TRANSFER Wei Wang
2017-03-08 4:01 ` Michael S. Tsirkin
2017-03-09 7:12 ` Wei Wang
2017-03-03 5:40 ` [PATCH v7 kernel 3/5] virtio-balloon: implementation of VIRTIO_BALLOON_F_CHUNK_TRANSFER Wei Wang
2017-03-08 4:01 ` Michael S. Tsirkin
2017-03-10 10:02 ` [virtio-dev] " Wei Wang
2017-03-10 13:26 ` David Hildenbrand
2017-03-10 15:37 ` Michael S. Tsirkin
2017-03-09 14:14 ` Matthew Wilcox
2017-03-10 11:37 ` Wei Wang
2017-03-10 15:58 ` Michael S. Tsirkin
2017-03-10 17:11 ` Matthew Wilcox
2017-03-10 19:10 ` Michael S. Tsirkin
2017-03-10 21:18 ` Matthew Wilcox
2017-03-10 19:35 ` Michael S. Tsirkin
2017-03-10 21:25 ` Matthew Wilcox
2017-03-12 0:05 ` Michael S. Tsirkin
2017-03-11 11:59 ` Wei Wang
2017-03-11 14:09 ` Matthew Wilcox
2017-03-12 1:59 ` Wang, Wei W
2017-03-12 4:04 ` Michael S. Tsirkin
2017-03-13 12:41 ` Wang, Wei W
2017-03-12 0:07 ` Michael S. Tsirkin
2017-03-03 5:40 ` [PATCH v7 kernel 4/5] virtio-balloon: define flags and head for host request vq Wei Wang
2017-03-08 4:02 ` Michael S. Tsirkin [this message]
2017-03-03 5:40 ` [PATCH v7 kernel 5/5] This patch contains two parts: Wei Wang
2017-03-06 13:23 ` David Hildenbrand
2017-03-09 7:04 ` Wei Wang
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