Re: [Announce] [patch] Modular Scheduler Core and Completely Fair Scheduler [CFS]

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On Mon, Apr 16, 2007 at 09:28:24AM -0500, Matt Mackall wrote:
> On Mon, Apr 16, 2007 at 05:03:49AM +0200, Nick Piggin wrote:
> > I'd prefer if we kept a single CPU scheduler in mainline, because I
> > think that simplifies analysis and focuses testing.
> 
> I think you'll find something like 80-90% of the testing will be done
> on the default choice, even if other choices exist. So you really
> won't have much of a problem here.
> 
> But when the only choice for other schedulers is to go out-of-tree,
> then only 1% of the people will try it out and those people are
> guaranteed to be the ones who saw scheduling problems in mainline.
> So the alternative won't end up getting any testing on many of the
> workloads that work fine in mainstream so their feedback won't tell
> you very much at all.

Yeah I concede that perhaps it is the only way to get things going
any further. But how do we decide if and when the current scheduler
should be demoted from default, and which should replace it?
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