A Practical Guide to Red HatВ® LinuxВ®: Fedoraв„ў Core and Red Hat Enterprise Linux (3rd Edition)

New I/O Elevators

I/O elevators control how long I/O requests can be queued to allow them to be re-ordered for optimal device performance. The Linux 2.6 kernel includes some additional settings that allow I/O elevators to be tuned for specific high-device-load situations.