Re: CFQ will be the new default IO scheduler - why?
- From: Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>
- Date: Mon, 24 Jul 2006 08:41:37 -0400 (EDT)
On Mon, 24 Jul 2006, Matthias Andree wrote:
On Sun, 23 Jul 2006, Paa Paa wrote:
The default IO scheduler in 2.6.18 will be CFQ (Complete Fair Queuing)
instead of AS (Anticipatory Scheduler) as described here:
http://wiki.kernelnewbies.org/Linux_2_6_18. I tried to find (here, at lkml)
the discussion about this change with no luck.
That wiki document nicely shows the advantage of the scheduler, namely
that you have "ionice", which isn't possible for AS or Deadline
Schedulers - this allows the operating system to run processes like
updatedb with "nice I/O", meaning these hold when you're doing other
I/O.
--
Matthias Andree
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Should there be a default scheduler per filesystem? As some filesystems may perform better/worse with one over another?
Justin.
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- References:
- CFQ will be the new default IO scheduler - why?
- From: Paa Paa
- Re: CFQ will be the new default IO scheduler - why?
- From: Matthias Andree
- CFQ will be the new default IO scheduler - why?
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