accept4 should be used in nginx( linux platform)

[muratpisat]

I use centos 5.5 system and I can not test accept4() in this. I don't
want to use a custom kernel and I'm not sure if I can compile a custom
kernel myself.

So, can anyone tell me how much performance gain occour with accept4()
over accept() on linux system?

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,148446,162830#msg-162830