Re: [patch] sched: fix active load balance

From: Ingo Molnar
Date: Wed Apr 13 2005 - 15:11:17 EST



* Siddha, Suresh B <suresh.b.siddha@xxxxxxxxx> wrote:

> - for_each_domain(target_cpu, sd) {
> + for_each_domain(target_cpu, sd)
> if ((sd->flags & SD_LOAD_BALANCE) &&
> - cpu_isset(busiest_cpu, sd->span)) {
> - sd = tmp;
> + cpu_isset(busiest_cpu, sd->span))
> break;
> - }
> - }

hm, the right fix i think is to do:

for_each_domain(target_cpu, tmp) {
if ((tmp->flags & SD_LOAD_BALANCE) &&
cpu_isset(busiest_cpu, tmp->span)) {
sd = tmp;
break;
}
}

because when balancing we want to match the widest-scope domain, not the
first one. The s/tmp/sd thing was a typo i suspect.

Ingo
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