Time sliced cfq ver14

Hi,

2.6.10-rc3-mm1 patch:

http://www.kernel.org/pub/linux/kernel/people/axboe/patch...

2.6-BK patch:

http://www.kernel.org/pub/linux/kernel/people/axboe/patch...

Changes:

- Fix leak of queue

- Better balance when to preempt. On 8 client read workload, aggregate
  bandwidth would take a few seconds to build up, due to initial massive
  preempt generation more seeks than it should. Priority check was also
  reverse which showed bad results on multi-prio work loads.

- Fix reversed priority check in preemption check, oops.

-- 
Jens Axboe

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