search for: virtqueue_indirect_desc_table_add

On Fri, Jun 09, 2017 at 06:41:41PM +0800, Wei Wang wrote: > - if (!virtqueue_indirect_desc_table_add(vq, desc, num)) { > + if (!virtqueue_indirect_desc_table_add(vq, desc, *num)) { > virtqueue_kick(vq); > - wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > - vb->balloon_page_chunk.chunk_num = 0; > + if (busy_wait) > + while (!virtqueue_get_buf(vq, &len)...

On Fri, Jun 09, 2017 at 06:41:41PM +0800, Wei Wang wrote: > - if (!virtqueue_indirect_desc_table_add(vq, desc, num)) { > + if (!virtqueue_indirect_desc_table_add(vq, desc, *num)) { > virtqueue_kick(vq); > - wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > - vb->balloon_page_chunk.chunk_num = 0; > + if (busy_wait) > + while (!virtqueue_get_buf(vq, &len)...

...On 06/21/2017 08:28 PM, Michael S. Tsirkin wrote: >>> On Wed, Jun 21, 2017 at 11:28:00AM +0800, Wei Wang wrote: >>>> On 06/21/2017 12:18 AM, Michael S. Tsirkin wrote: >>>>> On Fri, Jun 09, 2017 at 06:41:41PM +0800, Wei Wang wrote: >>>>>> - if (!virtqueue_indirect_desc_table_add(vq, desc, num)) { >>>>>> + if (!virtqueue_indirect_desc_table_add(vq, desc, *num)) { >>>>>> virtqueue_kick(vq); >>>>>> - wait_event(vb->acked, virtqueue_get_buf(vq, &len)); >>>>>> - vb->balloon_page_chunk.chun...

...ge_chunk.page_bmap[i], 0, + VIRTIO_BALLOON_PAGE_BMAP_SIZE); +} + +static void send_page_chunks(struct virtio_balloon *vb, struct virtqueue *vq) +{ + unsigned int len, num; + struct vring_desc *desc = vb->balloon_page_chunk.desc_table; + + num = vb->balloon_page_chunk.chunk_num; + if (!virtqueue_indirect_desc_table_add(vq, desc, num)) { + virtqueue_kick(vq); + wait_event(vb->acked, virtqueue_get_buf(vq, &len)); + vb->balloon_page_chunk.chunk_num = 0; + } +} + +/* Add a chunk to the buffer. */ +static void add_one_chunk(struct virtio_balloon *vb, struct virtqueue *vq, + u64 base_addr, u32 size) +{...

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, 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. Liang Li

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, 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. Liang Li

...LLOON_PAGE_BMAP_SIZE); > +} > + > +static void send_page_chunks(struct virtio_balloon *vb, struct virtqueue *vq) > +{ > + unsigned int len, num; > + struct vring_desc *desc = vb->balloon_page_chunk.desc_table; > + > + num = vb->balloon_page_chunk.chunk_num; > + if (!virtqueue_indirect_desc_table_add(vq, desc, num)) { > + virtqueue_kick(vq); > + wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > + vb->balloon_page_chunk.chunk_num = 0; > + } > +} > + > +/* Add a chunk to the buffer. */ > +static void add_one_chunk(struct virtio_balloon *vb, struct virtqueu...

...LLOON_PAGE_BMAP_SIZE); > +} > + > +static void send_page_chunks(struct virtio_balloon *vb, struct virtqueue *vq) > +{ > + unsigned int len, num; > + struct vring_desc *desc = vb->balloon_page_chunk.desc_table; > + > + num = vb->balloon_page_chunk.chunk_num; > + if (!virtqueue_indirect_desc_table_add(vq, desc, num)) { > + virtqueue_kick(vq); > + wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > + vb->balloon_page_chunk.chunk_num = 0; > + } > +} > + > +/* Add a chunk to the buffer. */ > +static void add_one_chunk(struct virtio_balloon *vb, struct virtqueu...

...is used for the cmdq_hdr, so chunks will be + * added from the second desc. + */ + reset_num = 1; + break; + default: + dev_warn(&vb->vdev->dev, "%s: unknown page chunk type %d\n", + __func__, type); + return; + } - num = vb->balloon_page_chunk.chunk_num; - if (!virtqueue_indirect_desc_table_add(vq, desc, num)) { + if (!virtqueue_indirect_desc_table_add(vq, desc, *num)) { virtqueue_kick(vq); - wait_event(vb->acked, virtqueue_get_buf(vq, &len)); - vb->balloon_page_chunk.chunk_num = 0; + if (busy_wait) + while (!virtqueue_get_buf(vq, &len) && + !virtque...