search for: max_order_nr_pages

On Tue, Jun 19, 2018 at 08:13:37PM +0800, Wei Wang wrote: > On 06/19/2018 11:05 AM, Michael S. Tsirkin wrote: > > On Tue, Jun 19, 2018 at 01:06:48AM +0000, Wang, Wei W wrote: > > > On Monday, June 18, 2018 10:29 AM, Michael S. Tsirkin wrote: > > > > On Sat, Jun 16, 2018 at 01:09:44AM +0000, Wang, Wei W wrote: > > > > > Not necessarily, I think. We have

...ean passing two arrays (two allocations by get_free_pages(,MAX_ORDER -1)) to the mm API? Please see if the following logic aligns to what you think: uint32_t i, max_hints, hints_per_page, hints_per_array, total_arrays; unsigned long *arrays; /* * Each array size is MAX_ORDER_NR_PAGES. If one array is not enough to * store all the hints, we need to allocate multiple arrays. * max_hints: the max number of 4MB free page blocks * hints_per_page: the number of hints each page can store * hints_per_array: the number of hints an array can store...

...AGE]; + return 0; } +static int send_start_cmd_id(struct virtio_balloon *vb) +{ + struct scatterlist sg; + struct virtqueue *vq = vb->free_page_vq; + + vb->cmd_start.id = cpu_to_virtio32(vb->vdev, vb->cmd_id_active); + vb->cmd_start.size = cpu_to_virtio32(vb->vdev, + MAX_ORDER_NR_PAGES * PAGE_SIZE); + sg_init_one(&sg, &vb->cmd_start, + sizeof(struct virtio_balloon_free_page_hints_cmd)); + return virtqueue_add_outbuf(vq, &sg, 1, &vb->cmd_start, GFP_KERNEL); +} + +static int send_stop_cmd_id(struct virtio_balloon *vb) +{ + struct scatterlist sg; + struct...

This patch series is separated from the previous "Virtio-balloon Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT, implemented by this series enables the virtio-balloon driver to report hints of guest free pages to the host. It can be used to accelerate live migration of VMs. Here is an introduction of this usage: Live migration needs to transfer the VM's

This patch series is separated from the previous "Virtio-balloon Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT, implemented by this series enables the virtio-balloon driver to report hints of guest free pages to the host. It can be used to accelerate live migration of VMs. Here is an introduction of this usage: Live migration needs to transfer the VM's

...t send_start_cmd_id(struct virtio_balloon *vb) > +{ > + struct scatterlist sg; > + struct virtqueue *vq = vb->free_page_vq; > + > + vb->cmd_start.id = cpu_to_virtio32(vb->vdev, vb->cmd_id_active); > + vb->cmd_start.size = cpu_to_virtio32(vb->vdev, > + MAX_ORDER_NR_PAGES * PAGE_SIZE); > + sg_init_one(&sg, &vb->cmd_start, > + sizeof(struct virtio_balloon_free_page_hints_cmd)); > + return virtqueue_add_outbuf(vq, &sg, 1, &vb->cmd_start, GFP_KERNEL); > +} > + > +static int send_stop_cmd_id(struct virtio_balloon *vb) > +{...

...t send_start_cmd_id(struct virtio_balloon *vb) > +{ > + struct scatterlist sg; > + struct virtqueue *vq = vb->free_page_vq; > + > + vb->cmd_start.id = cpu_to_virtio32(vb->vdev, vb->cmd_id_active); > + vb->cmd_start.size = cpu_to_virtio32(vb->vdev, > + MAX_ORDER_NR_PAGES * PAGE_SIZE); > + sg_init_one(&sg, &vb->cmd_start, > + sizeof(struct virtio_balloon_free_page_hints_cmd)); > + return virtqueue_add_outbuf(vq, &sg, 1, &vb->cmd_start, GFP_KERNEL); > +} > + > +static int send_stop_cmd_id(struct virtio_balloon *vb) > +{...

This patch series is separated from the previous "Virtio-balloon Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT, implemented by this series enables the virtio-balloon driver to report hints of guest free pages to the host. It can be used to accelerate live migration of VMs. Here is an introduction of this usage: Live migration needs to transfer the VM's