KernelTrap: Modular IO Schedulers

"Jens Axboe provided a patch that makes the various IO schedulers fully modular, allowing people to switch between them on the fly. With the patch applied, on a running system you can switch between Nick Piggin's anticipatory IO scheduler, Jens' deadline IO scheduler, Jens' CFQ IO scheduler, and the noop IO scheduler.

"Jens points out that, 'with the io schedulers fully modular, it is possible to add a new io scheduler type without touching the core kernel at all.' He also notes that at least one scheduler must be compiled into the kernel, while the rest can be built as kernel modules..."

Complete Story

Related Stories:

• Andrew Morton: 2.6.9-rc1-mm5(Sep 13, 2004)
• KernelTrap: Where The Anticipatory Scheduler Shines(Feb 25, 2003)
• KernelTrap: Fair Queuing Disk Schedulers(Feb 13, 2003)