Optimized the RAID456 module in Linux. It reduced the RAID I/O by 50% under certain I/O pattern. Please read This paper for more infomation.
Prerequisites:
centos60,kernel-2.6.32
File lists:
raid5.patch----A patch file, which you could use it to patch your own kernel.
read-count/*----Contains the test scripts and programs.
raid456.ko----This is the module file in case that you don't want to compile the module yourself,
just make install, and insmod raid456.ko