Messages in this thread | | | Date | Sat, 04 Dec 2004 11:39:48 -0500 | From | Jeff Sipek <> | Subject | Re: [PATCH] Time sliced CFQ #2 |
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On Sat, Dec 04, 2004 at 11:49:21AM +0100, Jens Axboe wrote: > Hi, > > Second version of the time sliced CFQ. Changes: > > - Sync io has a fixed time slice like before, async io has both a time > based and a request based slice limit. The queue slice is expired when > one of these limits are reached. > > - Fix a bug in invoking the request handler on a plugged queue. > > - Drop the ->alloc_limit wakeup stuff, I'm not so sure it's a good idea > and there are probably wakeup races buried there. > > With the async rq slice limit, it behaves perfectly here for me with > readers competing with async writers. The main slice settings for a > queue are: > > - slice_sync: How many msec a sync disk slice lasts > - slice_idle: How long a sync slice is allowed to idle > - slice_async: How many msec an async disk slice lasts > - slice_async_rq: How many requests an async disk slice lasts
This looks very nice. And from your previous post (with version #1) it would look like you made my attempt at io priorities easier. We'll see ;-)
Thanks, Jeff. [unhandled content-type:application/pgp-signature] | |