Re: block device queues, elevatoring implicit or explicit?

[Jan Kara]

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@xxxxxxx>
SUSE Labs, CR
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