xen-netfront: request Tx response events more often
Trying to batch Tx response events results in poor performance because this delays freeing the transmitted skbs. Instead use the standard RING_FINAL_CHECK_FOR_RESPONSES() macro to be notified once the next Tx response is placed on the ring. Signed-off-by: Malcolm Crossley <malcolm.crossley@citrix.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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