Re: 2.5.47 scheduler problems?

From: Mike Galbraith (efault@gmx.de)
Date: Fri Nov 22 2002 - 06:07:36 EST


At 12:41 AM 11/22/2002 -0500, Jim Houston wrote:
>Hi Mike, Rik, Everyone,
>
>The O(1) schedule just isn't fair. It will run a subset
>of the runable processes excluding the rest. See my earlier
>emails for the details.
>
>I had been working on a fix for this but got distracted
>by Posix timers. I still hope to get back to it.
>
>My patch is here:
>http://marc.theaimsgroup.com/?l=linux-kernel&m=103508412423719&w=2

In a brief test, this seems to cure my problem.

>It fixes fairness but breaks nice(2). Rik van Riel has a
>patch here which builds on my patch which fixes this:
>http://marc.theaimsgroup.com/?l=linux-kernel&m=103651801424031&w=2

(I haven't test this one yet)

>I just gave this a spin with. The patches still apply cleanly
>to linux-2.5.48 and it seems well behaved:-)

It seems a little choppy still for a not swapping load, but greatly improved.

Thanks!

         -Mike

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