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SubjectRe: [PATCH v2 05/12] cpuset: use effective cpumask to build sched domains
On Fri, Oct 11, 2013 at 05:50:38PM +0800, Li Zefan wrote:
> @@ -930,10 +931,21 @@ static void update_cpumasks_hier(struct cpuset *cs, struct cpuset *trialcs,
>
> update_tasks_cpumask(cp, heap);
>
> + /*
> + * If the effective cpumask of any non-empty cpuset is
> + * changed, we need to rebuild sched domains.
> + */
> + if (!cpumask_empty(cp->cpus_allowed) &&
> + is_sched_load_balance(cp))
> + need_rebuild_sched_domains = true;
> +

Can you please explain *why* this change is being made in the patch
description? The patch description doesn't give me anything and the
comment explain "what" but not why it's moved from update_cpumask()
into this function with an extra condition.

Thanks.

--
tejun


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