From Red Hat 8.0 to Centos 5.3

This page is reserved for the porting from Red Hat 8.0 to Centos 5.3:

1). What is changed?
a). Native Posix Thread support. Special synchronization primitive: futex
b). O(1) scheduler and SMP Scalability.
c). Preemptive kernel.
d). Latency improvement. schedule latency <0.5 microseconds
e). Redesign block layer
f). Improved VM Subsystem