search for: free_receive_bufs

...if (err < 0) put_page(virt_to_head_page(buf)); @@ -617,6 +610,7 @@ static bool try_fill_recv(struct receive_queue *rq, gfp_t gfp) int err; bool oom; + gfp |= __GFP_COLD; do { if (vi->mergeable_rx_bufs) err = add_recvbuf_mergeable(rq, gfp); @@ -1377,6 +1371,14 @@ static void free_receive_bufs(struct virtnet_info *vi) } } +static void free_receive_page_frags(struct virtnet_info *vi) +{ + int i; + for (i = 0; i < vi->max_queue_pairs; i++) + if (vi->rq[i].alloc_frag.page) + put_page(vi->rq[i].alloc_frag.page); +} + static void free_unused_bufs(struct virtnet_info *vi)...

...free_netdev(dev); 1968 return err; 1969 } 1970 1971 static void remove_vq_common(struct virtnet_info *vi) 1972 { 1973 vi->vdev->config->reset(vi->vdev); 1974 1975 /* Free unused buffers in both send and recv, if any. */ 1976 free_unused_bufs(vi); 1977 1978 free_receive_bufs(vi); 1979 1980 free_receive_page_frags(vi); 1981 1982 virtnet_del_vqs(vi); 1983 } 1984 1985 static void virtnet_remove(struct virtio_device *vdev) 1986 { 1987 struct virtnet_info *vi = vdev->priv; 1988 1989 unregister_hotcpu_notifier(&vi->nb); 1990 1991...

...free_netdev(dev); 1968 return err; 1969 } 1970 1971 static void remove_vq_common(struct virtnet_info *vi) 1972 { 1973 vi->vdev->config->reset(vi->vdev); 1974 1975 /* Free unused buffers in both send and recv, if any. */ 1976 free_unused_bufs(vi); 1977 1978 free_receive_bufs(vi); 1979 1980 free_receive_page_frags(vi); 1981 1982 virtnet_del_vqs(vi); 1983 } 1984 1985 static void virtnet_remove(struct virtio_device *vdev) 1986 { 1987 struct virtnet_info *vi = vdev->priv; 1988 1989 unregister_hotcpu_notifier(&vi->nb); 1990 1991...

...t a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 7afc990..85e6098 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -1830,6 +1830,8 @@ static int virtnet_probe(struct virtio_device *vdev) return 0; free_recv_bufs: + vi->vdev->config->reset(vdev); + free_receive_bufs(vi); unregister_netdev(dev); free_vqs: -- MST

...N) { + len += hole; + alloc_frag->offset += hole; + } - sg_init_one(rq->sg, buf, MERGE_BUFFER_LEN); + sg_init_one(rq->sg, buf, len); err = virtqueue_add_inbuf(rq->vq, rq->sg, 1, buf, gfp); if (err < 0) put_page(virt_to_head_page(buf)); @@ -1377,6 +1376,16 @@ static void free_receive_bufs(struct virtnet_info *vi) } } +static void free_receive_page_frags(struct virtnet_info *vi) +{ + int i; + for (i = 0; i < vi->max_queue_pairs; i++) + if (vi->rq[i].atomic_frag.page) + put_page(vi->rq[i].atomic_frag.page); + if (vi->sleep_frag.page) + put_page(vi->sleep_fra...

...N) { + len += hole; + alloc_frag->offset += hole; + } - sg_init_one(rq->sg, buf, MERGE_BUFFER_LEN); + sg_init_one(rq->sg, buf, len); err = virtqueue_add_inbuf(rq->vq, rq->sg, 1, buf, gfp); if (err < 0) put_page(virt_to_head_page(buf)); @@ -1335,6 +1335,16 @@ static void free_receive_bufs(struct virtnet_info *vi) } } +static void free_receive_page_frags(struct virtnet_info *vi) +{ + int i; + for (i = 0; i < vi->max_queue_pairs; i++) + if (vi->rq[i].atomic_frag.page) + put_page(vi->rq[i].atomic_frag.page); + if (vi->sleep_frag.page) + put_page(vi->sleep_fra...

skb_page_frag_refill currently permits only order-0 page allocs unless GFP_WAIT is used. Change skb_page_frag_refill to attempt higher-order page allocations whether or not GFP_WAIT is used. If memory cannot be allocated, the allocator will fall back to successively smaller page allocs (down to order-0 page allocs). This change brings skb_page_frag_refill in line with the existing page allocation

skb_page_frag_refill currently permits only order-0 page allocs unless GFP_WAIT is used. Change skb_page_frag_refill to attempt higher-order page allocations whether or not GFP_WAIT is used. If memory cannot be allocated, the allocator will fall back to successively smaller page allocs (down to order-0 page allocs). This change brings skb_page_frag_refill in line with the existing page allocation

...pages() to recycle the pages like before which may help the performance. We can also do some optimizations for this in vhost. > err = virtqueue_add_inbuf(rq->vq, rq->sg, 1, buf, gfp); > if (err < 0) > put_page(virt_to_head_page(buf)); > @@ -1377,6 +1376,16 @@ static void free_receive_bufs(struct virtnet_info *vi) > } > } > > +static void free_receive_page_frags(struct virtnet_info *vi) > +{ > + int i; > + for (i = 0; i < vi->max_queue_pairs; i++) > + if (vi->rq[i].atomic_frag.page) > + put_page(vi->rq[i].atomic_frag.page); > + if (vi...

...pages() to recycle the pages like before which may help the performance. We can also do some optimizations for this in vhost. > err = virtqueue_add_inbuf(rq->vq, rq->sg, 1, buf, gfp); > if (err < 0) > put_page(virt_to_head_page(buf)); > @@ -1377,6 +1376,16 @@ static void free_receive_bufs(struct virtnet_info *vi) > } > } > > +static void free_receive_page_frags(struct virtnet_info *vi) > +{ > + int i; > + for (i = 0; i < vi->max_queue_pairs; i++) > + if (vi->rq[i].atomic_frag.page) > + put_page(vi->rq[i].atomic_frag.page); > + if (vi...

Hi all: This series is an update version of multiqueue virtio-net driver based on Krishna Kumar's work to let virtio-net use multiple rx/tx queues to do the packets reception and transmission. Please review and comments. A protype implementation of qemu-kvm support could by found in git://github.com/jasowang/qemu-kvm-mq.git. To start a guest with two queues, you could specify the queues

Hi all: This series is an update version of multiqueue virtio-net driver based on Krishna Kumar's work to let virtio-net use multiple rx/tx queues to do the packets reception and transmission. Please review and comments. A protype implementation of qemu-kvm support could by found in git://github.com/jasowang/qemu-kvm-mq.git. To start a guest with two queues, you could specify the queues

Hi all: This series is an update version of multiqueue virtio-net driver based on Krishna Kumar's work to let virtio-net use multiple rx/tx queues to do the packets reception and transmission. Please review and comments. A protype implementation of qemu-kvm support could by found in git://github.com/jasowang/qemu-kvm-mq.git. To start a guest with two queues, you could specify the queues

Hi all: This series is an update version of multiqueue virtio-net driver based on Krishna Kumar's work to let virtio-net use multiple rx/tx queues to do the packets reception and transmission. Please review and comments. A protype implementation of qemu-kvm support could by found in git://github.com/jasowang/qemu-kvm-mq.git. To start a guest with two queues, you could specify the queues

The virtio-net device currently uses aligned MTU-sized mergeable receive packet buffers. Network throughput for workloads with large average packet size can be improved by posting larger receive packet buffers. However, due to SKB truesize effects, posting large (e.g, PAGE_SIZE) buffers reduces the throughput of workloads that do not benefit from GRO and have no large inbound packets. This

The virtio-net device currently uses aligned MTU-sized mergeable receive packet buffers. Network throughput for workloads with large average packet size can be improved by posting larger receive packet buffers. However, due to SKB truesize effects, posting large (e.g, PAGE_SIZE) buffers reduces the throughput of workloads that do not benefit from GRO and have no large inbound packets. This

Hi all: This series is an update version of multiqueue virtio-net driver based on Krishna Kumar's work to let virtio-net use multiple rx/tx queues to do the packets reception and transmission. Please review and comments. A protype implementation of qemu-kvm support could by found in git://github.com/jasowang/qemu-kvm-mq.git. To start a guest with two queues, you could specify the queues

Hi all: This series is an update version of multiqueue virtio-net driver based on Krishna Kumar's work to let virtio-net use multiple rx/tx queues to do the packets reception and transmission. Please review and comments. A protype implementation of qemu-kvm support could by found in git://github.com/jasowang/qemu-kvm-mq.git. To start a guest with two queues, you could specify the queues

Hi all: This series is an update version of multiqueue virtio-net driver based on Krishna Kumar's work to let virtio-net use multiple rx/tx queues to do the packets reception and transmission. Please review and comments. Changes from v5: - Align the implementation with the RFC spec update v4 - Switch the mode between single mode and multiqueue mode without reset - Remove the 256 limitation

Hi all: This series is an update version of multiqueue virtio-net driver based on Krishna Kumar's work to let virtio-net use multiple rx/tx queues to do the packets reception and transmission. Please review and comments. Changes from v5: - Align the implementation with the RFC spec update v4 - Switch the mode between single mode and multiqueue mode without reset - Remove the 256 limitation