search for: nr_buf

...nt len; > + struct scatterlist sg, sg2[BALLOON_BMAP_COUNT + 1]; > + unsigned int len, i; > + > + if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_PAGE_BITMAP)) { > + struct balloon_bmap_hdr *hdr = vb->bmap_hdr; > + unsigned long bmap_len; > + int nr_pfn, nr_used_bmap, nr_buf; > + > + nr_pfn = vb->end_pfn - vb->start_pfn + 1; > + nr_pfn = roundup(nr_pfn, BITS_PER_LONG); > + nr_used_bmap = nr_pfn / PFNS_PER_BMAP; > + bmap_len = nr_pfn / BITS_PER_BYTE; > + nr_buf = nr_used_bmap + 1; > + > + /* cmd, reserved and req_id are init to 0, unu...

...nt len; > + struct scatterlist sg, sg2[BALLOON_BMAP_COUNT + 1]; > + unsigned int len, i; > + > + if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_PAGE_BITMAP)) { > + struct balloon_bmap_hdr *hdr = vb->bmap_hdr; > + unsigned long bmap_len; > + int nr_pfn, nr_used_bmap, nr_buf; > + > + nr_pfn = vb->end_pfn - vb->start_pfn + 1; > + nr_pfn = roundup(nr_pfn, BITS_PER_LONG); > + nr_used_bmap = nr_pfn / PFNS_PER_BMAP; > + bmap_len = nr_pfn / BITS_PER_BYTE; > + nr_buf = nr_used_bmap + 1; > + > + /* cmd, reserved and req_id are init to 0, unu...

...struct scatterlist sg; - unsigned int len; + struct scatterlist sg, sg2[BALLOON_BMAP_COUNT + 1]; + unsigned int len, i; + + if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_PAGE_BITMAP)) { + struct balloon_bmap_hdr *hdr = vb->bmap_hdr; + unsigned long bmap_len; + int nr_pfn, nr_used_bmap, nr_buf; + + nr_pfn = vb->end_pfn - vb->start_pfn + 1; + nr_pfn = roundup(nr_pfn, BITS_PER_LONG); + nr_used_bmap = nr_pfn / PFNS_PER_BMAP; + bmap_len = nr_pfn / BITS_PER_BYTE; + nr_buf = nr_used_bmap + 1; + + /* cmd, reserved and req_id are init to 0, unused here */ + hdr->page_shift = cpu_...

...struct scatterlist sg; - unsigned int len; + struct scatterlist sg, sg2[BALLOON_BMAP_COUNT + 1]; + unsigned int len, i; + + if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_PAGE_BITMAP)) { + struct balloon_bmap_hdr *hdr = vb->bmap_hdr; + unsigned long bmap_len; + int nr_pfn, nr_used_bmap, nr_buf; + + nr_pfn = vb->end_pfn - vb->start_pfn + 1; + nr_pfn = roundup(nr_pfn, BITS_PER_LONG); + nr_used_bmap = nr_pfn / PFNS_PER_BMAP; + bmap_len = nr_pfn / BITS_PER_BYTE; + nr_buf = nr_used_bmap + 1; + + /* cmd, reserved and req_id are init to 0, unused here */ + hdr->page_shift = cpu_...

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%.