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Wei Wang says: ==================== tcp: change pingpong to 3 in delayed ack logic TCP receiver today tries not to delay the ACKs to speed up the initial slow start (a.k.a QUICK ACK mechanism). However the previous design does not work well with modern TCP applications that starts with an application-level handshake. For example, a HTTPs server often receives the SSL hello and responds right away which triggers the TCP stack to stop the quick ack and start delaying the ACKs based only one instance of ping-pong. This patchset changes the threshold from 1 to 3 ping-pong transactions, so that we only start to delay the acks after the receiver responds data quickly three times. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Linux kernel
============
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