search for: page_xb_start

...ed in the > > > + * page xbitmap. Each bit in the bitmap corresponds to a page of PAGE_SIZE. > > > + * The page xbitmap is searched for continuous "1" bits, which correspond > > > + * to continuous pages, to chunk into sgs. > > > + * > > > + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that > > > + * need to be searched. > > > + */ > > > +static void tell_host_sgs(struct virtio_balloon *vb, > > > + struct virtqueue *vq, > > > + unsigned long page_xb_start, > > > +...

...ed in the > > > + * page xbitmap. Each bit in the bitmap corresponds to a page of PAGE_SIZE. > > > + * The page xbitmap is searched for continuous "1" bits, which correspond > > > + * to continuous pages, to chunk into sgs. > > > + * > > > + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that > > > + * need to be searched. > > > + */ > > > +static void tell_host_sgs(struct virtio_balloon *vb, > > > + struct virtqueue *vq, > > > + unsigned long page_xb_start, > > > +...

...pages in sgs to host. The balloon pages are recorded in the > + * page xbitmap. Each bit in the bitmap corresponds to a page of PAGE_SIZE. > + * The page xbitmap is searched for continuous "1" bits, which correspond > + * to continuous pages, to chunk into sgs. > + * > + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that > + * need to be searched. > + */ > +static void tell_host_sgs(struct virtio_balloon *vb, > + struct virtqueue *vq, > + unsigned long page_xb_start, > + unsigned long page_xb_end) > +{ > + unsigned long...

...pages in sgs to host. The balloon pages are recorded in the > + * page xbitmap. Each bit in the bitmap corresponds to a page of PAGE_SIZE. > + * The page xbitmap is searched for continuous "1" bits, which correspond > + * to continuous pages, to chunk into sgs. > + * > + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that > + * need to be searched. > + */ > +static void tell_host_sgs(struct virtio_balloon *vb, > + struct virtqueue *vq, > + unsigned long page_xb_start, > + unsigned long page_xb_end) > +{ > + unsigned long...

...p. Each bit in the bitmap corresponds to a page of PAGE_SIZE. > > > > > + * The page xbitmap is searched for continuous "1" bits, which correspond > > > > > + * to continuous pages, to chunk into sgs. > > > > > + * > > > > > + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that > > > > > + * need to be searched. > > > > > + */ > > > > > +static void tell_host_sgs(struct virtio_balloon *vb, > > > > > + struct virtqueue *vq, > > > > > +...

...p. Each bit in the bitmap corresponds to a page of PAGE_SIZE. > > > > > + * The page xbitmap is searched for continuous "1" bits, which correspond > > > > > + * to continuous pages, to chunk into sgs. > > > > > + * > > > > > + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that > > > > > + * need to be searched. > > > > > + */ > > > > > +static void tell_host_sgs(struct virtio_balloon *vb, > > > > > + struct virtqueue *vq, > > > > > +...

...} + +/* + * Send balloon pages in sgs to host. The balloon pages are recorded in the + * page xbitmap. Each bit in the bitmap corresponds to a page of PAGE_SIZE. + * The page xbitmap is searched for continuous "1" bits, which correspond + * to continuous pages, to chunk into sgs. + * + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that + * need to be searched. + */ +static void tell_host_sgs(struct virtio_balloon *vb, + struct virtqueue *vq, + unsigned long page_xb_start, + unsigned long page_xb_end) +{ + unsigned long sg_pfn_start, sg_pfn_end; + void *sg_add...

...>>>> + * page xbitmap. Each bit in the bitmap corresponds to a page of PAGE_SIZE. >>>> + * The page xbitmap is searched for continuous "1" bits, which correspond >>>> + * to continuous pages, to chunk into sgs. >>>> + * >>>> + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that >>>> + * need to be searched. >>>> + */ >>>> +static void tell_host_sgs(struct virtio_balloon *vb, >>>> + struct virtqueue *vq, >>>> + unsigned long page_xb_start, >&gt...

...} + +/* + * Send balloon pages in sgs to host. The balloon pages are recorded in the + * page xbitmap. Each bit in the bitmap corresponds to a page of PAGE_SIZE. + * The page xbitmap is searched for continuous "1" bits, which correspond + * to continuous pages, to chunk into sgs. + * + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that + * need to be searched. + */ +static void tell_host_sgs(struct virtio_balloon *vb, + struct virtqueue *vq, + unsigned long page_xb_start, + unsigned long page_xb_end) +{ + unsigned long pfn_start, pfn_end; + uint64_t addr; + u...

...} + +/* + * Send balloon pages in sgs to host. The balloon pages are recorded in the + * page xbitmap. Each bit in the bitmap corresponds to a page of PAGE_SIZE. + * The page xbitmap is searched for continuous "1" bits, which correspond + * to continuous pages, to chunk into sgs. + * + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that + * need to be searched. + */ +static void tell_host_sgs(struct virtio_balloon *vb, + struct virtqueue *vq, + unsigned long page_xb_start, + unsigned long page_xb_end) +{ + unsigned long pfn_start, pfn_end; + uint32_t max_len =...

...} + +/* + * Send balloon pages in sgs to host. The balloon pages are recorded in the + * page xbitmap. Each bit in the bitmap corresponds to a page of PAGE_SIZE. + * The page xbitmap is searched for continuous "1" bits, which correspond + * to continuous pages, to chunk into sgs. + * + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that + * need to be searched. + */ +static void tell_host_sgs(struct virtio_balloon *vb, + struct virtqueue *vq, + unsigned long page_xb_start, + unsigned long page_xb_end) +{ + unsigned long sg_pfn_start, sg_pfn_end; + void *sg_add...

...} + +/* + * Send balloon pages in sgs to host. The balloon pages are recorded in the + * page xbitmap. Each bit in the bitmap corresponds to a page of PAGE_SIZE. + * The page xbitmap is searched for continuous "1" bits, which correspond + * to continuous pages, to chunk into sgs. + * + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that + * need to be searched. + */ +static void tell_host_sgs(struct virtio_balloon *vb, + struct virtqueue *vq, + unsigned long page_xb_start, + unsigned long page_xb_end) +{ + unsigned long pfn_start, pfn_end; + uint32_t max_len =...

...pages in sgs to host. The balloon pages are recorded in the > + * page xbitmap. Each bit in the bitmap corresponds to a page of PAGE_SIZE. > + * The page xbitmap is searched for continuous "1" bits, which correspond > + * to continuous pages, to chunk into sgs. > + * > + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that > + * need to be searched. > + */ > +static void tell_host_sgs(struct virtio_balloon *vb, > + struct virtqueue *vq, > + unsigned long page_xb_start, > + unsigned long page_xb_end) > +{ > + unsigned long...

...pages in sgs to host. The balloon pages are recorded in the > + * page xbitmap. Each bit in the bitmap corresponds to a page of PAGE_SIZE. > + * The page xbitmap is searched for continuous "1" bits, which correspond > + * to continuous pages, to chunk into sgs. > + * > + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that > + * need to be searched. > + */ > +static void tell_host_sgs(struct virtio_balloon *vb, > + struct virtqueue *vq, > + unsigned long page_xb_start, > + unsigned long page_xb_end) > +{ > + unsigned long...

...} + +/* + * Send balloon pages in sgs to host. The balloon pages are recorded in the + * page xbitmap. Each bit in the bitmap corresponds to a page of PAGE_SIZE. + * The page xbitmap is searched for continuous "1" bits, which correspond + * to continuous pages, to chunk into sgs. + * + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that + * need to be searched. + */ +static void tell_host_sgs(struct virtio_balloon *vb, + struct virtqueue *vq, + unsigned long page_xb_start, + unsigned long page_xb_end) +{ + unsigned long sg_pfn_start, sg_pfn_end; + void *sg_add...

...pages in sgs to host. The balloon pages are recorded in the > + * page xbitmap. Each bit in the bitmap corresponds to a page of PAGE_SIZE. > + * The page xbitmap is searched for continuous "1" bits, which correspond > + * to continuous pages, to chunk into sgs. > + * > + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that > + * need to be searched. > + */ > +static void tell_host_sgs(struct virtio_balloon *vb, > + struct virtqueue *vq, > + unsigned long page_xb_start, > + unsigned long page_xb_end) > +{ > + unsigned long...

...pages in sgs to host. The balloon pages are recorded in the > + * page xbitmap. Each bit in the bitmap corresponds to a page of PAGE_SIZE. > + * The page xbitmap is searched for continuous "1" bits, which correspond > + * to continuous pages, to chunk into sgs. > + * > + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that > + * need to be searched. > + */ > +static void tell_host_sgs(struct virtio_balloon *vb, > + struct virtqueue *vq, > + unsigned long page_xb_start, > + unsigned long page_xb_end) > +{ > + unsigned long...

...+/* + * Send balloon pages in sgs to host. + * The balloon pages are recorded in the page xbitmap. Each bit in the bitmap + * corresponds to a page of PAGE_SIZE. The page xbitmap is searched for + * continuous "1" bits, which correspond to continuous pages, to chunk into + * sgs. + * + * @page_xb_start and @page_xb_end form the range of bits in the xbitmap that + * need to be serached. + */ +static void tell_host_sgs(struct virtio_balloon *vb, + struct virtqueue *vq, + unsigned long page_xb_start, + unsigned long page_xb_end) +{ + unsigned int head_id = VIRTQUEUE_DESC_ID_INIT, +...

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 array each time; and 2) free page block reporting: a new virtqueue to report guest free pages to the host. The second feature can be used to accelerate live migration of VMs. Here are some details: Live

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 array each time; and 2) free page block reporting: a new virtqueue to report guest free pages to the host. The second feature can be used to accelerate live migration of VMs. Here are some details: Live