search for: virtio_balloon_receive_stat

add modern header. This patch is for virtio 1.0 branch, doesn't apply to master. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- include/hw/virtio/virtio-balloon.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/hw/virtio/virtio-balloon.h b/include/hw/virtio/virtio-balloon.h index f863bfe..79eca67 100644 --- a/include/hw/virtio/virtio-balloon.h +++

add modern header. This patch is for virtio 1.0 branch, doesn't apply to master. Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- include/hw/virtio/virtio-balloon.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/hw/virtio/virtio-balloon.h b/include/hw/virtio/virtio-balloon.h index f863bfe..79eca67 100644 --- a/include/hw/virtio/virtio-balloon.h +++

...++++++++-------- > 1 file changed, 23 insertions(+), 8 deletions(-) > > diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c > index d2d7c3e..568a008 100644 > --- a/hw/virtio/virtio-balloon.c > +++ b/hw/virtio/virtio-balloon.c > @@ -239,7 +239,8 @@ static void virtio_balloon_receive_stats(VirtIODevice *vdev, VirtQueue *vq) > { > VirtIOBalloon *s = VIRTIO_BALLOON(vdev); > VirtQueueElement *elem = &s->stats_vq_elem; > - VirtIOBalloonStat stat; > + VirtIOBalloonStat legacy_stat; > + VirtIOBalloonStatModern modern_stat; > size_t offs...

...++++++++-------- > 1 file changed, 23 insertions(+), 8 deletions(-) > > diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c > index d2d7c3e..568a008 100644 > --- a/hw/virtio/virtio-balloon.c > +++ b/hw/virtio/virtio-balloon.c > @@ -239,7 +239,8 @@ static void virtio_balloon_receive_stats(VirtIODevice *vdev, VirtQueue *vq) > { > VirtIOBalloon *s = VIRTIO_BALLOON(vdev); > VirtQueueElement *elem = &s->stats_vq_elem; > - VirtIOBalloonStat stat; > + VirtIOBalloonStat legacy_stat; > + VirtIOBalloonStatModern modern_stat; > size_t offs...

...rtio-balloon.c | 31 +++++++++++++++++++++++-------- 1 file changed, 23 insertions(+), 8 deletions(-) diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c index d2d7c3e..568a008 100644 --- a/hw/virtio/virtio-balloon.c +++ b/hw/virtio/virtio-balloon.c @@ -239,7 +239,8 @@ static void virtio_balloon_receive_stats(VirtIODevice *vdev, VirtQueue *vq) { VirtIOBalloon *s = VIRTIO_BALLOON(vdev); VirtQueueElement *elem = &s->stats_vq_elem; - VirtIOBalloonStat stat; + VirtIOBalloonStat legacy_stat; + VirtIOBalloonStatModern modern_stat; size_t offset = 0; qemu_timeval tv; @@...

...changed, 23 insertions(+), 8 deletions(-) > > > > diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c > > index d2d7c3e..568a008 100644 > > --- a/hw/virtio/virtio-balloon.c > > +++ b/hw/virtio/virtio-balloon.c > > @@ -239,7 +239,8 @@ static void virtio_balloon_receive_stats(VirtIODevice *vdev, VirtQueue *vq) > > { > > VirtIOBalloon *s = VIRTIO_BALLOON(vdev); > > VirtQueueElement *elem = &s->stats_vq_elem; > > - VirtIOBalloonStat stat; > > + VirtIOBalloonStat legacy_stat; > > + VirtIOBalloonStatModern mode...

...p_desc() steps (the QEMU virtual address to >> the guest physical >> address relationship may be changed on the destination). > Yes but note how that rewind does not involve modifying the ring. > It just rolls back some indices. Yes, it rolls back the indices, then the following virtio_balloon_receive_stats() can re-pop out the previous entry given by the guest. Recall how stats_vq_elem works: there is only one stats buffer, which is used by the guest to report stats, and also used by the host to ask the guest for stats report. So the host can roll back one previous entry and what it gets will a...

...0,6 +518,7 @@ static void virtio_balloon_device_realize(DeviceState *dev, Error **errp) > s->ivq = virtio_add_queue(vdev, 128, virtio_balloon_handle_output); > s->dvq = virtio_add_queue(vdev, 128, virtio_balloon_handle_output); > s->svq = virtio_add_queue(vdev, 128, virtio_balloon_receive_stats); > + s->fvq = virtio_add_queue(vdev, 128, virtio_balloon_get_free_pages); > > reset_stats(s); > > diff --git a/include/hw/virtio/virtio-balloon.h b/include/hw/virtio/virtio-balloon.h > index 35f62ac..fc173e4 100644 > --- a/include/hw/virtio/virtio-balloon.h &gt...

..."); @@ -440,6 +518,7 @@ static void virtio_balloon_device_realize(DeviceState *dev, Error **errp) s->ivq = virtio_add_queue(vdev, 128, virtio_balloon_handle_output); s->dvq = virtio_add_queue(vdev, 128, virtio_balloon_handle_output); s->svq = virtio_add_queue(vdev, 128, virtio_balloon_receive_stats); + s->fvq = virtio_add_queue(vdev, 128, virtio_balloon_get_free_pages); reset_stats(s); diff --git a/include/hw/virtio/virtio-balloon.h b/include/hw/virtio/virtio-balloon.h index 35f62ac..fc173e4 100644 --- a/include/hw/virtio/virtio-balloon.h +++ b/include/hw/virtio/virtio-balloon...

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

The current QEMU live migration implementation mark the all the guest's RAM pages as dirtied in the ram bulk stage, all these pages will be processed and that takes quit a lot of CPU cycles. >From guest's point of view, it doesn't care about the content in free pages. We can make use of this fact and skip processing the free pages in the ram bulk stage, it can save a lot CPU cycles

The current QEMU live migration implementation mark the all the guest's RAM pages as dirtied in the ram bulk stage, all these pages will be processed and that takes quit a lot of CPU cycles. >From guest's point of view, it doesn't care about the content in free pages. We can make use of this fact and skip processing the free pages in the ram bulk stage, it can save a lot CPU cycles