search for: sg_pfn_start

...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_addr; > > > + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); > > > + > > > + sg_pfn_start = page_xb_start; > > > + while (sg_pfn_start < page_xb_end) { > > > + sg_pfn_start = xb_find_next_bit(&am...

...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_addr; > > > + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); > > > + > > > + sg_pfn_start = page_xb_start; > > > + while (sg_pfn_start < page_xb_end) { > > > + sg_pfn_start = xb_find_next_bit(&am...

...> +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_addr; > > > > > + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); > > > > > + > > > > > + sg_pfn_start = page_xb_start; > > > > > + while (sg_pfn_start < page_xb_end) { &gt...

...> +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_addr; > > > > > + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); > > > > > + > > > > > + sg_pfn_start = page_xb_start; > > > > > + while (sg_pfn_start < page_xb_end) { &gt...

...rched. >>>> + */ >>>> +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_addr; >>>> + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); >>>> + >>>> + sg_pfn_start = page_xb_start; >>>> + while (sg_pfn_start < page_xb_end) { >>>> + sg_pfn_start = xb_find_...

...o 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_addr; + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); + + sg_pfn_start = page_xb_start; + while (sg_pfn_start < page_xb_end) { + sg_pfn_start = xb_find_next_bit(&vb->page_xb, sg_pfn_start, + page_xb_end, 1); + if (sg_pfn_start == page_xb_end...

...o 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_addr; + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); + int err = 0; + + sg_pfn_start = page_xb_start; + while (sg_pfn_start < page_xb_end) { + sg_pfn_start = xb_find_next_set_bit(&vb->page_xb, sg_pfn_start, + page_xb_end); + if (sg_pfn_...

...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_addr; > + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); > + > + sg_pfn_start = page_xb_start; > + while (sg_pfn_start < page_xb_end) { > + sg_pfn_start = xb_find_next_bit(&vb->page_xb, sg_pfn_start, > + page_xb_end, 1);...

...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_addr; > + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); > + > + sg_pfn_start = page_xb_start; > + while (sg_pfn_start < page_xb_end) { > + sg_pfn_start = xb_find_next_bit(&vb->page_xb, sg_pfn_start, > + page_xb_end, 1);...

...o 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_addr; + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); + + sg_pfn_start = page_xb_start; + while (sg_pfn_start < page_xb_end) { + sg_pfn_start = xb_find_next_set_bit(&vb->page_xb, sg_pfn_start, + page_xb_end); + if (sg_pfn_start == page_x...

...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_addr; > + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); > + int err = 0; > + > + sg_pfn_start = page_xb_start; > + while (sg_pfn_start < page_xb_end) { > + sg_pfn_start = xb_find_next_set_bit(&vb->page_xb, sg_pfn_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_addr; > + uint32_t sg_len, sg_max_len = round_down(UINT_MAX, PAGE_SIZE); > + int err = 0; > + > + sg_pfn_start = page_xb_start; > + while (sg_pfn_start < page_xb_end) { > + sg_pfn_start = xb_find_next_set_bit(&vb->page_xb, sg_pfn_start, >...

...tmap 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, + prev_id = VIRTQUEUE_DESC_ID_INIT; + unsigned long sg_pfn_start, sg_pfn_end; + uint64_t sg_addr; + uint32_t sg_size; + + sg_pfn_start = page_xb_start; + while (sg_pfn_start < page_xb_end) { + sg_pfn_start = xb_find_next_bit(&vb->page_xb, sg_pfn_start, + page_xb_end, 1); + if (sg_pfn_start == page_xb_end + 1) + break; + sg_pfn_end = xb_find_n...

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 by one; and 2) free_page_vq: 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 migration needs to

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 by one; and 2) free_page_vq: 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 migration needs to

...if (busywait) + while (!virtqueue_get_buf(vq, &len) && + !virtqueue_is_broken(vq)) + cpu_relax(); + else + wait_event(vb->acked, virtqueue_get_buf(vq, &len)); } /* @@ -197,11 +210,11 @@ static void tell_host_sgs(struct virtio_balloon *vb, sg_addr = pfn_to_kaddr(sg_pfn_start); sg_len = (sg_pfn_end - sg_pfn_start) << PAGE_SHIFT; while (sg_len > sg_max_len) { - send_one_sg(vb, vq, sg_addr, sg_max_len); + send_one_sg(vb, vq, sg_addr, sg_max_len, 0); sg_addr += sg_max_len; sg_len -= sg_max_len; } - send_one_sg(vb, vq, sg_addr, sg_len); + sen...

...en(vq)) > + cpu_relax(); > + else > + wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > } > > /* > @@ -197,11 +210,11 @@ static void tell_host_sgs(struct virtio_balloon *vb, > sg_addr = pfn_to_kaddr(sg_pfn_start); > sg_len = (sg_pfn_end - sg_pfn_start) << PAGE_SHIFT; > while (sg_len > sg_max_len) { > - send_one_sg(vb, vq, sg_addr, sg_max_len); > + send_one_sg(vb, vq, sg_addr, sg_max_len, 0); >...

...en(vq)) > + cpu_relax(); > + else > + wait_event(vb->acked, virtqueue_get_buf(vq, &len)); > } > > /* > @@ -197,11 +210,11 @@ static void tell_host_sgs(struct virtio_balloon *vb, > sg_addr = pfn_to_kaddr(sg_pfn_start); > sg_len = (sg_pfn_end - sg_pfn_start) << PAGE_SHIFT; > while (sg_len > sg_max_len) { > - send_one_sg(vb, vq, sg_addr, sg_max_len); > + send_one_sg(vb, vq, sg_addr, sg_max_len, 0); >...

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 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.

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 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.