Re: [patch 2.6.16-mm2 10/9] sched throttle tree extract - kill interactive task feedback loop

[Con Kolivas <kernel@kolivas.org>]

On Thursday 06 April 2006 03:38, Mike Galbraith wrote:
> Greetings,
>
> The patch below stops interactive tasks from feeding off each other
> during round-robin.
>
> With this 10th patch in place, a busy server with _default_ throttle
> settings (ie tunables may now be mostly unneeded) looks like this:

> --- linux-2.6.16-mm2/kernel/sched.c-9.export_tunables	2006-03-31
> 13:37:09.000000000 +0200 +++ linux-2.6.16-mm2/kernel/sched.c	2006-04-05
> 19:22:01.000000000 +0200 @@ -3480,7 +3480,7 @@ go_idle:
>  	queue = array->queue + idx;
>  	next = list_entry(queue->next, task_t, run_list);
>
> -	if (!rt_task(next) && interactive_sleep(next->sleep_type)) {
> +	if (!TASK_INTERACTIVE(next) && interactive_sleep(next->sleep_type)) {

You can't remove that rt_task check from there can you? We shouldn't ever 
requeue a rt task.

Cheers,
Con
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