forked from luck/tmp_suning_uos_patched
virtio-net: add missing virtqueue kick when flushing packets
We tends to batch submitting packets during XDP_TX. This requires to
kick virtqueue after a batch, we tried to do it through
xdp_do_flush_map() which only makes sense for devmap not XDP_TX. So
explicitly kick the virtqueue in this case.
Reported-by: Kimitoshi Takahashi <ktaka@nii.ac.jp>
Tested-by: Kimitoshi Takahashi <ktaka@nii.ac.jp>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Fixes: 186b3c998c
("virtio-net: support XDP_REDIRECT")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
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2290482379
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@ -1269,7 +1269,9 @@ static int virtnet_poll(struct napi_struct *napi, int budget)
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{
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struct receive_queue *rq =
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container_of(napi, struct receive_queue, napi);
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unsigned int received;
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struct virtnet_info *vi = rq->vq->vdev->priv;
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struct send_queue *sq;
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unsigned int received, qp;
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bool xdp_xmit = false;
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virtnet_poll_cleantx(rq);
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@ -1280,8 +1282,13 @@ static int virtnet_poll(struct napi_struct *napi, int budget)
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if (received < budget)
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virtqueue_napi_complete(napi, rq->vq, received);
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if (xdp_xmit)
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if (xdp_xmit) {
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qp = vi->curr_queue_pairs - vi->xdp_queue_pairs +
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smp_processor_id();
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sq = &vi->sq[qp];
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virtqueue_kick(sq->vq);
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xdp_do_flush_map();
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}
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return received;
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}
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