similar to: [PATCH v15 5/5] virtio-balloon: VIRTIO_BALLOON_F_CTRL_VQ

Add a new vq, ctrl_vq, to handle commands between the host and guest. With this feature, we will be able to have the control plane and data plane separated. In other words, the control related commands of each feature will be sent via the ctrl_vq, meanwhile each feature may have its own vq used as a data plane. Free page report is the the first new feature controlled via ctrl_vq, and a new cmd

On Sat, Sep 30, 2017 at 12:05:54PM +0800, Wei Wang wrote: > Add a new vq, ctrl_vq, to handle commands between the host and guest. > With this feature, we will be able to have the control plane and data > plane separated. In other words, the control related commands of each > feature will be sent via the ctrl_vq, meanwhile each feature may have > its own vq used as a data plane. >

On Sat, Sep 30, 2017 at 12:05:54PM +0800, Wei Wang wrote: > Add a new vq, ctrl_vq, to handle commands between the host and guest. > With this feature, we will be able to have the control plane and data > plane separated. In other words, the control related commands of each > feature will be sent via the ctrl_vq, meanwhile each feature may have > its own vq used as a data plane. >

On Sunday, October 1, 2017 11:19 AM, Michael S. Tsirkin wrote: > On Sat, Sep 30, 2017 at 12:05:54PM +0800, Wei Wang wrote: > > +static void ctrlq_send_cmd(struct virtio_balloon *vb, > > + struct virtio_balloon_ctrlq_cmd *cmd, > > + bool inbuf) > > +{ > > + struct virtqueue *vq = vb->ctrl_vq; > > + > > + ctrlq_add_cmd(vq, cmd, inbuf); >

On Mon, Oct 02, 2017 at 04:38:01PM +0000, Wang, Wei W wrote: > On Sunday, October 1, 2017 11:19 AM, Michael S. Tsirkin wrote: > > On Sat, Sep 30, 2017 at 12:05:54PM +0800, Wei Wang wrote: > > > +static void ctrlq_send_cmd(struct virtio_balloon *vb, > > > + struct virtio_balloon_ctrlq_cmd *cmd, > > > + bool inbuf) > > > +{ > > > + struct

On Mon, Oct 02, 2017 at 04:38:01PM +0000, Wang, Wei W wrote: > On Sunday, October 1, 2017 11:19 AM, Michael S. Tsirkin wrote: > > On Sat, Sep 30, 2017 at 12:05:54PM +0800, Wei Wang wrote: > > > +static void ctrlq_send_cmd(struct virtio_balloon *vb, > > > + struct virtio_balloon_ctrlq_cmd *cmd, > > > + bool inbuf) > > > +{ > > > + struct

On 10/11/2017 09:49 PM, Michael S. Tsirkin wrote: > On Wed, Oct 11, 2017 at 02:03:20PM +0800, Wei Wang wrote: >> On 10/10/2017 11:15 PM, Michael S. Tsirkin wrote: >>> On Mon, Oct 02, 2017 at 04:38:01PM +0000, Wang, Wei W wrote: >>>> On Sunday, October 1, 2017 11:19 AM, Michael S. Tsirkin wrote: >>>>> On Sat, Sep 30, 2017 at 12:05:54PM +0800, Wei Wang

This patch series enhances the existing virtio-balloon with the following new features: 1) fast ballooning: transfer ballooned pages between the guest and host in chunks using sgs, instead of one array each time; and 2) free page block reporting: a new virtqueue to report guest free pages to the host. The second feature can be used to accelerate live migration of VMs. Here are some details: Live

This patch series enhances the existing virtio-balloon with the following new features: 1) fast ballooning: transfer ballooned pages between the guest and host in chunks using sgs, instead of one array each time; and 2) free page block reporting: a new virtqueue to report guest free pages to the host. The second feature can be used to accelerate live migration of VMs. Here are some details: Live

On Wed, Oct 11, 2017 at 02:03:20PM +0800, Wei Wang wrote: > On 10/10/2017 11:15 PM, Michael S. Tsirkin wrote: > > On Mon, Oct 02, 2017 at 04:38:01PM +0000, Wang, Wei W wrote: > > > On Sunday, October 1, 2017 11:19 AM, Michael S. Tsirkin wrote: > > > > On Sat, Sep 30, 2017 at 12:05:54PM +0800, Wei Wang wrote: > > > > > +static void ctrlq_send_cmd(struct

On Wed, Oct 11, 2017 at 02:03:20PM +0800, Wei Wang wrote: > On 10/10/2017 11:15 PM, Michael S. Tsirkin wrote: > > On Mon, Oct 02, 2017 at 04:38:01PM +0000, Wang, Wei W wrote: > > > On Sunday, October 1, 2017 11:19 AM, Michael S. Tsirkin wrote: > > > > On Sat, Sep 30, 2017 at 12:05:54PM +0800, Wei Wang wrote: > > > > > +static void ctrlq_send_cmd(struct

On 10/10/2017 11:15 PM, Michael S. Tsirkin wrote: > On Mon, Oct 02, 2017 at 04:38:01PM +0000, Wang, Wei W wrote: >> On Sunday, October 1, 2017 11:19 AM, Michael S. Tsirkin wrote: >>> On Sat, Sep 30, 2017 at 12:05:54PM +0800, Wei Wang wrote: >>>> +static void ctrlq_send_cmd(struct virtio_balloon *vb, >>>> + struct virtio_balloon_ctrlq_cmd *cmd,

On Thu, Oct 12, 2017 at 11:54:56AM +0800, Wei Wang wrote: > > But I think flushing is very fragile. You will easily run into races > > if one of the actors gets out of sync and keeps adding data. > > I think adding an ID in the free vq stream is a more robust > > approach. > > > > Adding ID to the free vq would need the device to distinguish whether it >

On Thu, Oct 12, 2017 at 11:54:56AM +0800, Wei Wang wrote: > > But I think flushing is very fragile. You will easily run into races > > if one of the actors gets out of sync and keeps adding data. > > I think adding an ID in the free vq stream is a more robust > > approach. > > > > Adding ID to the free vq would need the device to distinguish whether it >

Negotiation of the VIRTIO_BALLOON_F_FREE_PAGE_VQ feature indicates the support of reporting hints of guest free pages to the host via virtio-balloon. The host requests the guest to report the free pages by sending commands via the virtio-balloon configuration registers. When the guest starts to report, the first element added to the free page vq is a sequence id of the start reporting command.

You should Cc Nitesh who is working on a related feature. On Mon, Nov 13, 2017 at 06:34:48PM +0800, Wei Wang wrote: > Ping for comments, thanks. > > On 11/03/2017 04:13 PM, Wei Wang wrote: > > Negotiation of the VIRTIO_BALLOON_F_FREE_PAGE_VQ feature indicates the > > support of reporting hints of guest free pages to the host via > > virtio-balloon. The host requests

Ping for comments, thanks. On 11/03/2017 04:13 PM, Wei Wang wrote: > Negotiation of the VIRTIO_BALLOON_F_FREE_PAGE_VQ feature indicates the > support of reporting hints of guest free pages to the host via > virtio-balloon. The host requests the guest to report the free pages by > sending commands via the virtio-balloon configuration registers. > > When the guest starts to

Ping for comments, thanks. On 11/03/2017 04:13 PM, Wei Wang wrote: > Negotiation of the VIRTIO_BALLOON_F_FREE_PAGE_VQ feature indicates the > support of reporting hints of guest free pages to the host via > virtio-balloon. The host requests the guest to report the free pages by > sending commands via the virtio-balloon configuration registers. > > When the guest starts to

On Fri, Nov 03, 2017 at 04:13:06PM +0800, Wei Wang wrote: > Negotiation of the VIRTIO_BALLOON_F_FREE_PAGE_VQ feature indicates the > support of reporting hints of guest free pages to the host via > virtio-balloon. The host requests the guest to report the free pages by > sending commands via the virtio-balloon configuration registers. > > When the guest starts to report, the

On Fri, Nov 03, 2017 at 04:13:06PM +0800, Wei Wang wrote: > Negotiation of the VIRTIO_BALLOON_F_FREE_PAGE_VQ feature indicates the > support of reporting hints of guest free pages to the host via > virtio-balloon. The host requests the guest to report the free pages by > sending commands via the virtio-balloon configuration registers. > > When the guest starts to report, the