search for: stop_cmd_id

...ate_balloon_stats_work; @@ -63,6 +76,13 @@ struct virtio_balloon { spinlock_t stop_update_lock; bool stop_update; + /* The new cmd id received from host */ + uint32_t cmd_id_received; + /* The cmd id that is in use */ + __virtio32 cmd_id_use; + /* Buffer to store the stop sign */ + __virtio32 stop_cmd_id; + /* Waiting for host to ack the pages we released. */ wait_queue_head_t acked; @@ -320,17 +340,6 @@ static void stats_handle_request(struct virtio_balloon *vb) virtqueue_kick(vq); } -static void virtballoon_changed(struct virtio_device *vdev) -{ - struct virtio_balloon *vb = vdev->p...

This patch series is separated from the previous "Virtio-balloon Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_VQ, 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 memory

This patch series is separated from the previous "Virtio-balloon Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_VQ, 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 memory

...ruct virtio_balloon { > spinlock_t stop_update_lock; > bool stop_update; > > + /* The new cmd id received from host */ > + uint32_t cmd_id_received; > + /* The cmd id that is in use */ > + __virtio32 cmd_id_use; > + /* Buffer to store the stop sign */ > + __virtio32 stop_cmd_id; > + > /* Waiting for host to ack the pages we released. */ > wait_queue_head_t acked; > > @@ -320,17 +340,6 @@ static void stats_handle_request(struct virtio_balloon *vb) > virtqueue_kick(vq); > } > > -static void virtballoon_changed(struct virtio_device *vdev...

...ruct virtio_balloon { > spinlock_t stop_update_lock; > bool stop_update; > > + /* The new cmd id received from host */ > + uint32_t cmd_id_received; > + /* The cmd id that is in use */ > + __virtio32 cmd_id_use; > + /* Buffer to store the stop sign */ > + __virtio32 stop_cmd_id; > + > /* Waiting for host to ack the pages we released. */ > wait_queue_head_t acked; > > @@ -320,17 +340,6 @@ static void stats_handle_request(struct virtio_balloon *vb) > virtqueue_kick(vq); > } > > -static void virtballoon_changed(struct virtio_device *vdev...

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

...on { spinlock_t stop_update_lock; bool stop_update; + /* Start to report free pages */ + bool report_free_page; + /* Stores the cmd id given by host to start the free page reporting */ + uint32_t start_cmd_id; + /* Stores STOP_ID as a sign to tell host that the reporting is done */ + uint32_t stop_cmd_id; + /* Waiting for host to ack the pages we released. */ wait_queue_head_t acked; @@ -281,6 +293,71 @@ static unsigned int update_balloon_stats(struct virtio_balloon *vb) return idx; } +static void add_one_sg(struct virtqueue *vq, unsigned long pfn, uint32_t len) +{ + struct scatterlist s...

...spinlock_t stop_update_lock; bool stop_update; + /* Start to report free pages */ + bool report_free_page; + /* Stores the cmd id given by host to start the free page reporting */ + __virtio32 start_cmd_id; + /* Stores STOP_ID as a sign to tell host that the reporting is done */ + __virtio32 stop_cmd_id; + /* Waiting for host to ack the pages we released. */ wait_queue_head_t acked; @@ -281,6 +300,56 @@ static unsigned int update_balloon_stats(struct virtio_balloon *vb) return idx; } +static void add_one_sg(struct virtqueue *vq, unsigned long pfn, uint32_t len) +{ + struct scatterlist s...

...ate_balloon_stats_work; @@ -63,6 +76,13 @@ struct virtio_balloon { spinlock_t stop_update_lock; bool stop_update; + /* The new cmd id received from host */ + uint32_t cmd_id_received; + /* The cmd id that is in use */ + __virtio32 cmd_id_use; + /* Buffer to store the stop sign */ + __virtio32 stop_cmd_id; + /* Waiting for host to ack the pages we released. */ wait_queue_head_t acked; @@ -320,17 +340,6 @@ static void stats_handle_request(struct virtio_balloon *vb) virtqueue_kick(vq); } -static void virtballoon_changed(struct virtio_device *vdev) -{ - struct virtio_balloon *vb = vdev->p...

This patch series is separated from the previous "Virtio-balloon Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_VQ, 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 memory

...> bool stop_update; > > + /* The new cmd id received from host */ > + uint32_t cmd_id_received; > + /* The cmd id that is in use */ > + __virtio32 cmd_id_use; I'd prefer cmd_id_active but it's not critical. > + /* Buffer to store the stop sign */ > + __virtio32 stop_cmd_id; > + > /* Waiting for host to ack the pages we released. */ > wait_queue_head_t acked; > > @@ -320,17 +340,6 @@ static void stats_handle_request(struct virtio_balloon *vb) > virtqueue_kick(vq); > } > > -static void virtballoon_changed(struct virtio_device *vdev...

...spinlock_t stop_update_lock; bool stop_update; + /* Start to report free pages */ + bool report_free_page; + /* Stores the cmd id given by host to start the free page reporting */ + __virtio32 start_cmd_id; + /* Stores STOP_ID as a sign to tell host that the reporting is done */ + __virtio32 stop_cmd_id; + /* Waiting for host to ack the pages we released. */ wait_queue_head_t acked; @@ -281,6 +300,53 @@ static unsigned int update_balloon_stats(struct virtio_balloon *vb) return idx; } +static int add_one_sg(struct virtqueue *vq, unsigned long pfn, uint32_t len) +{ + struct scatterlist sg...

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

...ool stop_update; > > + /* Start to report free pages */ > + bool report_free_page; > + /* Stores the cmd id given by host to start the free page reporting */ > + __virtio32 start_cmd_id; > + /* Stores STOP_ID as a sign to tell host that the reporting is done */ > + __virtio32 stop_cmd_id; > + > /* Waiting for host to ack the pages we released. */ > wait_queue_head_t acked; > > @@ -281,6 +300,56 @@ static unsigned int update_balloon_stats(struct virtio_balloon *vb) > return idx; > } > > +static void add_one_sg(struct virtqueue *vq, unsigned long...

...ool stop_update; > > + /* Start to report free pages */ > + bool report_free_page; > + /* Stores the cmd id given by host to start the free page reporting */ > + __virtio32 start_cmd_id; > + /* Stores STOP_ID as a sign to tell host that the reporting is done */ > + __virtio32 stop_cmd_id; > + > /* Waiting for host to ack the pages we released. */ > wait_queue_head_t acked; > > @@ -281,6 +300,56 @@ static unsigned int update_balloon_stats(struct virtio_balloon *vb) > return idx; > } > > +static void add_one_sg(struct virtqueue *vq, unsigned long...

...bool stop_update; > > + /* Start to report free pages */ > + bool report_free_page; > + /* Stores the cmd id given by host to start the free page reporting */ > + uint32_t start_cmd_id; > + /* Stores STOP_ID as a sign to tell host that the reporting is done */ > + uint32_t stop_cmd_id; > + > /* Waiting for host to ack the pages we released. */ > wait_queue_head_t acked; > > @@ -281,6 +293,71 @@ static unsigned int update_balloon_stats(struct > virtio_balloon *vb) > return idx; > } > > +static void add_one_sg(struct virtqueue *vq, unsigned...

...bool stop_update; > > + /* Start to report free pages */ > + bool report_free_page; > + /* Stores the cmd id given by host to start the free page reporting */ > + uint32_t start_cmd_id; > + /* Stores STOP_ID as a sign to tell host that the reporting is done */ > + uint32_t stop_cmd_id; > + > /* Waiting for host to ack the pages we released. */ > wait_queue_head_t acked; > > @@ -281,6 +293,71 @@ static unsigned int update_balloon_stats(struct > virtio_balloon *vb) > return idx; > } > > +static void add_one_sg(struct virtqueue *vq, unsigned...

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

...send_free_page_cmd_id(vb, &vb->start_cmd_id); if (page_poisoning_enabled() && !IS_ENABLED(CONFIG_PAGE_POISONING_NO_SANITY)) walk_free_mem_block(vb, 0, &virtio_balloon_send_free_pages); send_free_page_cmd_id(vb, &vb->stop_cmd_id); walk_free_mem_block() should be a more generic API, and this potential page poisoning issue is specific to live migration which is only one use case of this function, so I think it is better to handle it in the special use case itself. Best, Wei

...send_free_page_cmd_id(vb, &vb->start_cmd_id); if (page_poisoning_enabled() && !IS_ENABLED(CONFIG_PAGE_POISONING_NO_SANITY)) walk_free_mem_block(vb, 0, &virtio_balloon_send_free_pages); send_free_page_cmd_id(vb, &vb->stop_cmd_id); walk_free_mem_block() should be a more generic API, and this potential page poisoning issue is specific to live migration which is only one use case of this function, so I think it is better to handle it in the special use case itself. Best, Wei