hv_netvsc: Implement batching of receive completions
The existing code uses busy retry when unable to send out receive completions due to full ring buffer. It also gives up retrying after limit is reached, and causes receive buffer slots not being recycled. This patch implements batching of receive completions. It also prevents dropping receive completions due to full ring buffer. Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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