search for: virtqueue_detach_buf

..., head_id, prev_id, 0); + if (*head_id == *prev_id) { + /* + * The VQ was full and kicked to release some descs. Now we + * will re-start to build the chain by using the hdr as the + * first desc, so we need to detach the desc that was just + * added, and re-start to add the hdr. + */ + virtqueue_detach_buf(vb->cmd_vq, *head_id, NULL); + *head_id = VIRTQUEUE_DESC_ID_INIT; + *prev_id = VIRTQUEUE_DESC_ID_INIT; + goto retry; + } +} + +static void cmdq_handle_stats(struct virtio_balloon *vb) +{ + unsigned int num_stats, + head_id = VIRTQUEUE_DESC_ID_INIT, + prev_id = VIRTQUEUE_DESC_ID_IN...

...detect ring full. > + /* > + * The VQ was full and kicked to release some descs. Now we > + * will re-start to build the chain by using the hdr as the > + * first desc, so we need to detach the desc that was just > + * added, and re-start to add the hdr. > + */ > + virtqueue_detach_buf(vb->cmd_vq, *head_id, NULL); > + *head_id = VIRTQUEUE_DESC_ID_INIT; > + *prev_id = VIRTQUEUE_DESC_ID_INIT; > + goto retry; > + } > +} > + > +static void cmdq_handle_stats(struct virtio_balloon *vb) > +{ > + unsigned int num_stats, > + head_id = VIRTQUEUE_DE...

...detect ring full. > + /* > + * The VQ was full and kicked to release some descs. Now we > + * will re-start to build the chain by using the hdr as the > + * first desc, so we need to detach the desc that was just > + * added, and re-start to add the hdr. > + */ > + virtqueue_detach_buf(vb->cmd_vq, *head_id, NULL); > + *head_id = VIRTQUEUE_DESC_ID_INIT; > + *prev_id = VIRTQUEUE_DESC_ID_INIT; > + goto retry; > + } > +} > + > +static void cmdq_handle_stats(struct virtio_balloon *vb) > +{ > + unsigned int num_stats, > + head_id = VIRTQUEUE_DE...

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 by one; and 2) cmdq: a new virtqueue to send commands between the device and driver. Currently, it supports commands to report memory stats (replace the old statq mechanism) and report guest unused pages.

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 by one; and 2) cmdq: a new virtqueue to send commands between the device and driver. Currently, it supports commands to report memory stats (replace the old statq mechanism) and report guest unused pages.