Huawei Xie c121c8d6d3 virtio: add simple Tx
Bulk free of mbufs when clean used ring.
Shift operation of idx could be saved if vq_free_cnt means
free slots rather than free descriptors.

TODO: rearrange vq data structure, pack the stats var together so that
we could use one vec instruction to update all of them.

Signed-off-by: Huawei Xie <huawei.xie@intel.com>
Acked-by: Jianfeng Tan <jianfeng.tan@intel.com>
2015-11-02 15:34:03 +01:00
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