search for: used_nr_bmap

...+static void send_unused_pages_info(struct virtio_balloon *vb, + unsigned long req_id) +{ + struct scatterlist sg_in; + unsigned long pfn = 0, bmap_len, pfn_limit, last_pfn, nr_pfn; + struct virtqueue *vq = vb->req_vq; + struct virtio_balloon_resp_hdr *hdr = vb->resp_hdr; + int ret = 1, used_nr_bmap = 0, i; + + if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_PAGE_BITMAP) && + vb->nr_page_bmap == 1) + extend_page_bitmap(vb); + + pfn_limit = PFNS_PER_BMAP * vb->nr_page_bmap; + mutex_lock(&vb->balloon_lock); + last_pfn = get_max_pfn(); + + while (ret) { + clear_page_b...

...nfo(struct virtio_balloon *vb, > + unsigned long req_id) > +{ > + struct scatterlist sg_in; > + unsigned long pfn = 0, bmap_len, pfn_limit, last_pfn, nr_pfn; > + struct virtqueue *vq = vb->req_vq; > + struct virtio_balloon_resp_hdr *hdr = vb->resp_hdr; > + int ret = 1, used_nr_bmap = 0, i; > + > + if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_PAGE_BITMAP) && > + vb->nr_page_bmap == 1) > + extend_page_bitmap(vb); > + > + pfn_limit = PFNS_PER_BMAP * vb->nr_page_bmap; > + mutex_lock(&vb->balloon_lock); > + last_pfn = get_max_...

...nfo(struct virtio_balloon *vb, > + unsigned long req_id) > +{ > + struct scatterlist sg_in; > + unsigned long pfn = 0, bmap_len, pfn_limit, last_pfn, nr_pfn; > + struct virtqueue *vq = vb->req_vq; > + struct virtio_balloon_resp_hdr *hdr = vb->resp_hdr; > + int ret = 1, used_nr_bmap = 0, i; > + > + if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_PAGE_BITMAP) && > + vb->nr_page_bmap == 1) > + extend_page_bitmap(vb); > + > + pfn_limit = PFNS_PER_BMAP * vb->nr_page_bmap; > + mutex_lock(&vb->balloon_lock); > + last_pfn = get_max_...

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.

...> + unsigned long req_id) > > +{ > > + struct scatterlist sg_in; > > + unsigned long pfn = 0, bmap_len, pfn_limit, last_pfn, nr_pfn; > > + struct virtqueue *vq = vb->req_vq; > > + struct virtio_balloon_resp_hdr *hdr = vb->resp_hdr; > > + int ret = 1, used_nr_bmap = 0, i; > > + > > + if (virtio_has_feature(vb->vdev, > VIRTIO_BALLOON_F_PAGE_BITMAP) && > > + vb->nr_page_bmap == 1) > > + extend_page_bitmap(vb); > > + > > + pfn_limit = PFNS_PER_BMAP * vb->nr_page_bmap; > > + mutex_lock(&vb->b...

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.

This patch set contains two parts of changes to the virtio-balloon. One is the change for speeding up the inflating & deflating process, the main idea of this optimization is to use bitmap to send the page information to host instead of the PFNs, to reduce the overhead of virtio data transmission, address translation and madvise(). This can help to improve the performance by about 85%.