search for: get_free_page_and_send

Since virtio-ccw doesn't work with accessing to the config space inside an interrupt context, this patch series avoids that issue by moving the config register accesses to the related workqueue contexts. v1->v2 ChangeLog: - add config_read_bitmap to indicate to the workqueue callbacks about the necessity of reading the related config fields. Wei Wang (2): virtio-balloon: tweak

On Wednesday, February 5, 2020 12:50 AM, Michael S. Tsirkin wrote: > > Michael, any clue on which event we have to wait with > > VIRTIO_BALLOON_F_MUST_TELL_HOST? IMHO, I don't think > > VIRTIO_BALLOON_F_MUST_TELL_HOST applies to > > VIRTIO_BALLOON_F_FREE_PAGE_HINT and we'd better document that. It > introduces complexity with no clear benefit. > > I meant

On Wednesday, February 5, 2020 12:50 AM, Michael S. Tsirkin wrote: > > Michael, any clue on which event we have to wait with > > VIRTIO_BALLOON_F_MUST_TELL_HOST? IMHO, I don't think > > VIRTIO_BALLOON_F_MUST_TELL_HOST applies to > > VIRTIO_BALLOON_F_FREE_PAGE_HINT and we'd better document that. It > introduces complexity with no clear benefit. > > I meant

..._update) { + queue_work(system_freezable_wq, + &vb->update_balloon_size_work); + virtio_balloon_queue_free_page_work(vb); } + spin_unlock_irqrestore(&vb->stop_update_lock, flags); } static void update_balloon_size(struct virtio_balloon *vb) @@ -609,6 +609,16 @@ static int get_free_page_and_send(struct virtio_balloon *vb) return 0; } +static void virtio_balloon_read_cmd_id_received(struct virtio_balloon *vb) +{ + if (!test_and_clear_bit(VIRTIO_BALLOON_CONFIG_READ_CMD_ID, + &vb->config_read_bitmap)) + return; + + virtio_cread(vb->vdev, struct virtio_balloon_config, +...

...e_wq, > + &vb->update_balloon_size_work); > + virtio_balloon_queue_free_page_work(vb); > } > + spin_unlock_irqrestore(&vb->stop_update_lock, flags); > } > > static void update_balloon_size(struct virtio_balloon *vb) > @@ -609,6 +609,16 @@ static int get_free_page_and_send(struct virtio_balloon *vb) > return 0; > } > > +static void virtio_balloon_read_cmd_id_received(struct virtio_balloon *vb) > +{ > + if (!test_and_clear_bit(VIRTIO_BALLOON_CONFIG_READ_CMD_ID, > + &vb->config_read_bitmap)) > + return; > + > + virtio_cread...

...e_wq, > + &vb->update_balloon_size_work); > + virtio_balloon_queue_free_page_work(vb); > } > + spin_unlock_irqrestore(&vb->stop_update_lock, flags); > } > > static void update_balloon_size(struct virtio_balloon *vb) > @@ -609,6 +609,16 @@ static int get_free_page_and_send(struct virtio_balloon *vb) > return 0; > } > > +static void virtio_balloon_read_cmd_id_received(struct virtio_balloon *vb) > +{ > + if (!test_and_clear_bit(VIRTIO_BALLOON_CONFIG_READ_CMD_ID, > + &vb->config_read_bitmap)) > + return; > + > + virtio_cread...

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