tree c1d130980b720167581a0f74a9a8bd2746e8cee2
parent 28a94d8fb35b3a75b802f368ae6f4a9f6b0d435a
author Tom Herbert <tom@herbertland.com> 1457388663 -0800
committer David S. Miller <davem@davemloft.net> 1457559373 -0500

net: Add MSG_BATCH flag

Add a new msg flag called MSG_BATCH. This flag is used in sendmsg to
indicate that more messages will follow (i.e. a batch of messages is
being sent). This is similar to MSG_MORE except that the following
messages are not merged into one packet, they are sent individually.
sendmmsg is updated so that each contained message except for the
last one is marked as MSG_BATCH.

MSG_BATCH is a performance optimization in cases where a socket
implementation can benefit by transmitting packets in a batch.

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>