From: Haishuang Yan <yanhaishu...@cmss.chinamobile.com> Date: Wed, 27 Sep 2017 11:35:43 +0800
> Different namespace application might require different time period in > second to disable Fastopen on active TCP sockets. > > Tested: > Simulate following similar situation that the server's data gets dropped > after 3WHS. > C ---- syn-data ---> S > C <--- syn/ack ----- S > C ---- ack --------> S > S (accept & write) > C? X <- data ------ S > [retry and timeout] > > And then print netstat of TCPFastOpenBlackhole, the counter increased as > expected when the firewall blackhole issue is detected and active TFO is > disabled. > # cat /proc/net/netstat | awk '{print $91}' > TCPFastOpenBlackhole > 1 > > Signed-off-by: Haishuang Yan <yanhaishu...@cmss.chinamobile.com> Applied.