On Tue, Jul 23, 2013 at 10:20:20PM +0600, Rakib Mullick wrote:
> You mean using sd == NULL rather than using update_cache_domain variable ?
Yes, note how:
@@ -6109,7 +6110,7 @@ static void detach_destroy_domains(const struct cpumask
*cpu_map)
rcu_read_lock();
for_each_cpu(i, cpu_map)
- cpu_attach_domain(NULL, &def_root_domain, i);
rcu_read_unlock();
}
Always has NULL for sd? Which means you can do:
@@ -5138,7 +5138,8 @@ cpu_attach_domain(struct sched_domain *sd, struct
root_domain *rd, int cpu)
rcu_assign_pointer(rq->sd, sd);
destroy_sched_domains(tmp, cpu);
- update_top_cache_domain(cpu);
+ if (sd)
+ update_top_cache_domain(cpu);
}
/* cpus with isolated domains */
--
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