syscall使用详解

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// Set backlog size to the maximum
	if err = syscall.Listen(fd, syscall.SOMAXCONN); err != nil {
		syscall.Close(fd)
		return nil, err
	}

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SYSCALL_DEFINE2(listen, int, fd, int, backlog)
{
    // sysctl_somaxconn 是系统变量 net.core.somaxconn 的值
    int somaxconn = sysctl_somaxconn;
    if ((unsigned int)backlog > somaxconn)
        backlog = somaxconn;
    sock->ops->listen(sock, backlog);
}