谁是idiot？
有人在有人问是不是要实现类似FreeBSD的ZERO_COPY_SOCKET的时候怒啦，说啦：“I claim that Mach people (and apparently FreeBSD) are incompetent idiots. Playing games with VM is bad. memory copies are also bad, but quite frankly, memory copies often have less downside than VM games, and bigger caches will only continue to drive that point home.”
可是：
a) ZERO_COPY_SOCKET 并非默认启用的功能。
b) FreeBSD在7年前就实现了这个功能，某些系统至今连这个选项都没有。
c) FreeBSD的zero_copy manpage明示了其性能影响。
您也老大不小的人了，怎么老改不了这小孩的毛病呢？