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SubjectRe: block device queues, elevatoring implicit or explicit?
On Sat 16-03-13 02:06:00, Raymond Jennings wrote:
> Are all block devices fundamentally elevators or fifos or what?
>
> To be blunt, if a bunch of concurrent processes dump requests on a
> noop queue, are they serviced fifo or in elevator order or what?
>
> My goal is to get a dumb elevator that does nothing but sweep up and
> down the disk mopping up outstanding requests as the disk heads ooze
> across the sectors.
With noop io scheduler you get the FIFO ordering of requests.

Honza
--
Jan Kara <jack@suse.cz>
SUSE Labs, CR


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