hv_netvsc: Add a comment clarifying batching logic
The batching logic in netvsc_send is non-trivial, due to a combination of the Linux API and the underlying hypervisor interface. Add a comment explaining why the code is written this way. Signed-off-by: NShachar Raindel <shacharr@microsoft.com> Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com> Reviewed-by: NDexuan Cui <decui@microsoft.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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