search for: nr_used_bmap

...; - 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 t...

...; - 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 t...

...eue *vq) { - 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_shif...

...eue *vq) { - 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_shif...

...pos = one + chunk_size; >> + } else >> + break; >> + } >> +} >> >> +static void tell_host(struct virtio_balloon *vb, struct virtqueue *vq) >> +{ >> + if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_CHUNK_TRANSFER)) { >> + int nr_pfn, nr_used_bmap, i; >> + unsigned long start_pfn, bmap_len; >> + >> + start_pfn = vb->start_pfn; >> + nr_pfn = vb->end_pfn - start_pfn + 1; >> + nr_pfn = roundup(nr_pfn, BITS_PER_LONG); >> + nr_used_bmap = nr_pfn / PFNS_PER_PAGE_BMAP; > better name here including &...

...ne, chunk_size); > + } > + pos = one + chunk_size; > + } else > + break; > + } > +} > > +static void tell_host(struct virtio_balloon *vb, struct virtqueue *vq) > +{ > + if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_CHUNK_TRANSFER)) { > + int nr_pfn, nr_used_bmap, i; > + unsigned long start_pfn, bmap_len; > + > + start_pfn = vb->start_pfn; > + nr_pfn = vb->end_pfn - start_pfn + 1; > + nr_pfn = roundup(nr_pfn, BITS_PER_LONG); > + nr_used_bmap = nr_pfn / PFNS_PER_PAGE_BMAP; better name here including "page"? And bmaps i...

...ne, chunk_size); > + } > + pos = one + chunk_size; > + } else > + break; > + } > +} > > +static void tell_host(struct virtio_balloon *vb, struct virtqueue *vq) > +{ > + if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_CHUNK_TRANSFER)) { > + int nr_pfn, nr_used_bmap, i; > + unsigned long start_pfn, bmap_len; > + > + start_pfn = vb->start_pfn; > + nr_pfn = vb->end_pfn - start_pfn + 1; > + nr_pfn = roundup(nr_pfn, BITS_PER_LONG); > + nr_used_bmap = nr_pfn / PFNS_PER_PAGE_BMAP; better name here including "page"? And bmaps i...

...ata(vb, vq, busy_wait); + do_set_resp_bitmap(vb, start_pfn + one, pages); + } + pos = one + pages; + } else + pos = one; + } +} + +static void tell_host(struct virtio_balloon *vb, struct virtqueue *vq) +{ + if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_PAGE_RANGE)) { + int nr_pfn, nr_used_bmap, i; + unsigned long start_pfn, bmap_len; + + start_pfn = vb->start_pfn; + nr_pfn = vb->end_pfn - start_pfn + 1; + nr_pfn = roundup(nr_pfn, BITS_PER_LONG); + nr_used_bmap = nr_pfn / PFNS_PER_BMAP; + if (nr_pfn % PFNS_PER_BMAP) + nr_used_bmap++; + bmap_len = nr_pfn / BITS_PER_BYTE; + +...

..., busy_wait); + do_set_resp_bitmap(vb, start_pfn + one, chunk_size); + } + pos = one + chunk_size; + } else + break; + } +} +static void tell_host(struct virtio_balloon *vb, struct virtqueue *vq) +{ + if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_CHUNK_TRANSFER)) { + int nr_pfn, nr_used_bmap, i; + unsigned long start_pfn, bmap_len; + + start_pfn = vb->start_pfn; + nr_pfn = vb->end_pfn - start_pfn + 1; + nr_pfn = roundup(nr_pfn, BITS_PER_LONG); + nr_used_bmap = nr_pfn / PFNS_PER_PAGE_BMAP; + if (nr_pfn % PFNS_PER_PAGE_BMAP) + nr_used_bmap++; + bmap_len = nr_pfn / BITS_PER...

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%.

Take over this work from Liang. This patch series implements two optimizations: 1) transfer pages in chuncks between the guest and host; 1) transfer the guest unused pages to the host so that they can be skipped to migrate in live migration. Please check patch 0003 for more details about optimization 1). For an idle guest with 8GB RAM, optimization 2) can help shorten the total live migration

Take over this work from Liang. This patch series implements two optimizations: 1) transfer pages in chuncks between the guest and host; 1) transfer the guest unused pages to the host so that they can be skipped to migrate in live migration. Please check patch 0003 for more details about optimization 1). For an idle guest with 8GB RAM, optimization 2) can help shorten the total live migration

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%.

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 {pfn|length} to present the page information 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%.