Re: [PATCH] Time sliced cfq with basic io priorities

From: Jens Axboe
Date: Tue Dec 14 2004 - 08:38:51 EST


Version -12 has been uploaded. Changes:

- Small optimization to choose next request logic

- An idle queue that exited would waste time for the next process

- Request allocation changes. Should get a smooth stream for writes now,
not as bursty as before. Also simplified the may_queue/check_waiters
logic, rely more on the regular block rq allocation congestion and
don't waste sys time doing multiple wakeups.

- Fix compilation on x86_64

No io priority specific fixes, the above are all to improve the cfq time

For 2.6.10-rc3-mm1:

For 2.6-BK:

Jens Axboe

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