如何使用XFS设置保证io？

Question

根据维基百科，XFS能够保证IO的速度。如何在Linux（更具体地说是Centos 5.5）下设置它？或者这只适用于IRIX？

Answer 1

Quoting Dave Chinner：

   Linux doesn't support GRIO. It's an Irix only thing, and that
    required special hardware support for bandwidth reservation, special
    frame schedulers in the IO path, etc.