search for: send_one_desc

...t; page_to_balloon_pfn(page) + i); > } > > +static void kick_and_wait(struct virtqueue *vq, wait_queue_head_t wq_head) > +{ > + unsigned int len; > + > + virtqueue_kick(vq); > + wait_event(wq_head, virtqueue_get_buf(vq, &len)); > +} > + > +static void send_one_desc(struct virtio_balloon *vb, > + struct virtqueue *vq, > + uint64_t addr, > + uint32_t len, > + bool inbuf, > + bool batch) > +{ > + int err; > + unsigned int size; > + > + /* Detach all the used buffers from the vq */ > + while (virtqueue_get_buf(...

...t; page_to_balloon_pfn(page) + i); > } > > +static void kick_and_wait(struct virtqueue *vq, wait_queue_head_t wq_head) > +{ > + unsigned int len; > + > + virtqueue_kick(vq); > + wait_event(wq_head, virtqueue_get_buf(vq, &len)); > +} > + > +static void send_one_desc(struct virtio_balloon *vb, > + struct virtqueue *vq, > + uint64_t addr, > + uint32_t len, > + bool inbuf, > + bool batch) > +{ > + int err; > + unsigned int size; > + > + /* Detach all the used buffers from the vq */ > + while (virtqueue_get_buf(...

...1 @@ static void set_page_pfns(struct virtio_balloon *vb, page_to_balloon_pfn(page) + i); } +static void kick_and_wait(struct virtqueue *vq, wait_queue_head_t wq_head) +{ + unsigned int len; + + virtqueue_kick(vq); + wait_event(wq_head, virtqueue_get_buf(vq, &len)); +} + +static void send_one_desc(struct virtio_balloon *vb, + struct virtqueue *vq, + uint64_t addr, + uint32_t len, + bool inbuf, + bool batch) +{ + int err; + unsigned int size; + + /* Detach all the used buffers from the vq */ + while (virtqueue_get_buf(vq, &size)) + ; + + err = virtqueue_add_one_desc(v...

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

...rtio_balloon.c > index 035bd3a..6ac4cff 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -652,7 +652,9 @@ static void report_free_page(struct work_struct *work) > /* Start by sending the obtained cmd id to the host with an outbuf */ > send_one_desc(vb, vb->free_page_vq, virt_to_phys(&vb->start_cmd_id), > sizeof(uint32_t), false, true, false); > - walk_free_mem_block(vb, 0, &virtio_balloon_send_free_pages); > + if (!(page_poisoning_enabled() && > + !IS_ENABLED(CONFIG_PAGE_POISONING_NO_SANITY))) &g...

...rtio_balloon.c > index 035bd3a..6ac4cff 100644 > --- a/drivers/virtio/virtio_balloon.c > +++ b/drivers/virtio/virtio_balloon.c > @@ -652,7 +652,9 @@ static void report_free_page(struct work_struct *work) > /* Start by sending the obtained cmd id to the host with an outbuf */ > send_one_desc(vb, vb->free_page_vq, virt_to_phys(&vb->start_cmd_id), > sizeof(uint32_t), false, true, false); > - walk_free_mem_block(vb, 0, &virtio_balloon_send_free_pages); > + if (!(page_poisoning_enabled() && > + !IS_ENABLED(CONFIG_PAGE_POISONING_NO_SANITY))) &g...

...t; > > --- a/drivers/virtio/virtio_balloon.c > > > +++ b/drivers/virtio/virtio_balloon.c > > > @@ -652,7 +652,9 @@ static void report_free_page(struct work_struct *work) > > > /* Start by sending the obtained cmd id to the host with an outbuf */ > > > send_one_desc(vb, vb->free_page_vq, virt_to_phys(&vb->start_cmd_id), > > > sizeof(uint32_t), false, true, false); > > > - walk_free_mem_block(vb, 0, &virtio_balloon_send_free_pages); > > > + if (!(page_poisoning_enabled() && > > > + !IS_ENAB...

...t; > > --- a/drivers/virtio/virtio_balloon.c > > > +++ b/drivers/virtio/virtio_balloon.c > > > @@ -652,7 +652,9 @@ static void report_free_page(struct work_struct *work) > > > /* Start by sending the obtained cmd id to the host with an outbuf */ > > > send_one_desc(vb, vb->free_page_vq, virt_to_phys(&vb->start_cmd_id), > > > sizeof(uint32_t), false, true, false); > > > - walk_free_mem_block(vb, 0, &virtio_balloon_send_free_pages); > > > + if (!(page_poisoning_enabled() && > > > + !IS_ENAB...

..._balloon.c b/drivers/virtio/virtio_balloon.c index 035bd3a..6ac4cff 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -652,7 +652,9 @@ static void report_free_page(struct work_struct *work) /* Start by sending the obtained cmd id to the host with an outbuf */ send_one_desc(vb, vb->free_page_vq, virt_to_phys(&vb->start_cmd_id), sizeof(uint32_t), false, true, false); - walk_free_mem_block(vb, 0, &virtio_balloon_send_free_pages); + if (!(page_poisoning_enabled() && + !IS_ENABLED(CONFIG_PAGE_POISONING_NO_SANITY))) + walk_free_mem_block...

...dex 035bd3a..6ac4cff 100644 >> --- a/drivers/virtio/virtio_balloon.c >> +++ b/drivers/virtio/virtio_balloon.c >> @@ -652,7 +652,9 @@ static void report_free_page(struct work_struct *work) >> /* Start by sending the obtained cmd id to the host with an outbuf */ >> send_one_desc(vb, vb->free_page_vq, virt_to_phys(&vb->start_cmd_id), >> sizeof(uint32_t), false, true, false); >> - walk_free_mem_block(vb, 0, &virtio_balloon_send_free_pages); >> + if (!(page_poisoning_enabled() && >> + !IS_ENABLED(CONFIG_PAGE_POISONIN...