diff options
| -rw-r--r-- | kernel/sched.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 5834c7fb79a..02d468844a9 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -359,8 +359,6 @@ struct rt_rq { * exclusive cpuset is created, we also create and attach a new root-domain * object. * - * By default the system creates a single root-domain with all cpus as - * members (mimicking the global state we have today). */ struct root_domain { atomic_t refcount; @@ -375,6 +373,10 @@ struct root_domain { atomic_t rto_count; }; +/* + * By default the system creates a single root-domain with all cpus as + * members (mimicking the global state we have today). + */ static struct root_domain def_root_domain; #endif @@ -5859,6 +5861,9 @@ static void rq_attach_root(struct rq *rq, struct root_domain *rd) class->leave_domain(rq); } + cpu_clear(rq->cpu, old_rd->span); + cpu_clear(rq->cpu, old_rd->online); + if (atomic_dec_and_test(&old_rd->refcount)) kfree(old_rd); } @@ -5866,6 +5871,10 @@ static void rq_attach_root(struct rq *rq, struct root_domain *rd) atomic_inc(&rd->refcount); rq->rd = rd; + cpu_set(rq->cpu, rd->span); + if (cpu_isset(rq->cpu, cpu_online_map)) + cpu_set(rq->cpu, rd->online); + for (class = sched_class_highest; class; class = class->next) { if (class->join_domain) class->join_domain(rq); @@ -5874,23 +5883,21 @@ static void rq_attach_root(struct rq *rq, struct root_domain *rd) spin_unlock_irqrestore(&rq->lock, flags); } -static void init_rootdomain(struct root_domain *rd, const cpumask_t *map) +static void init_rootdomain(struct root_domain *rd) { memset(rd, 0, sizeof(*rd)); - rd->span = *map; - cpus_and(rd->online, rd->span, cpu_online_map); + cpus_clear(rd->span); + cpus_clear(rd->online); } static void init_defrootdomain(void) { - cpumask_t cpus = CPU_MASK_ALL; - - init_rootdomain(&def_root_domain, &cpus); + init_rootdomain(&def_root_domain); atomic_set(&def_root_domain.refcount, 1); } -static struct root_domain *alloc_rootdomain(const cpumask_t *map) +static struct root_domain *alloc_rootdomain(void) { struct root_domain *rd; @@ -5898,7 +5905,7 @@ static struct root_domain *alloc_rootdomain(const cpumask_t *map) if (!rd) return NULL; - init_rootdomain(rd, map); + init_rootdomain(rd); return rd; } @@ -6319,7 +6326,7 @@ static int build_sched_domains(const cpumask_t *cpu_map) sched_group_nodes_bycpu[first_cpu(*cpu_map)] = sched_group_nodes; #endif - rd = alloc_rootdomain(cpu_map); + rd = alloc_rootdomain(); if (!rd) { printk(KERN_WARNING "Cannot alloc root domain\n"); return -ENOMEM; @@ -6894,7 +6901,6 @@ void __init sched_init(void) #ifdef CONFIG_SMP rq->sd = NULL; rq->rd = NULL; - rq_attach_root(rq, &def_root_domain); rq->active_balance = 0; rq->next_balance = jiffies; rq->push_cpu = 0; @@ -6903,6 +6909,7 @@ void __init sched_init(void) INIT_LIST_HEAD(&rq->migration_queue); rq->rt.highest_prio = MAX_RT_PRIO; rq->rt.overloaded = 0; + rq_attach_root(rq, &def_root_domain); #endif atomic_set(&rq->nr_iowait, 0); |