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Revert "cpu hotplug: adjust root-domain->online span in response to hotplug event"
This reverts commit 393d94d98b
.
Lets fix this right.
Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
parent
2f44bbb495
commit
1f94ef598e
1 changed files with 11 additions and 7 deletions
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@ -5813,13 +5813,6 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
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/* Must be high prio: stop_machine expects to yield to it. */
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rq = task_rq_lock(p, &flags);
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__setscheduler(rq, p, SCHED_FIFO, MAX_RT_PRIO-1);
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/* Update our root-domain */
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if (rq->rd) {
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BUG_ON(!cpu_isset(cpu, rq->rd->span));
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cpu_set(cpu, rq->rd->online);
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}
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task_rq_unlock(rq, &flags);
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cpu_rq(cpu)->migration_thread = p;
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break;
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@ -5828,6 +5821,15 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
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case CPU_ONLINE_FROZEN:
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/* Strictly unnecessary, as first user will wake it. */
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wake_up_process(cpu_rq(cpu)->migration_thread);
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/* Update our root-domain */
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rq = cpu_rq(cpu);
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spin_lock_irqsave(&rq->lock, flags);
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if (rq->rd) {
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BUG_ON(!cpu_isset(cpu, rq->rd->span));
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cpu_set(cpu, rq->rd->online);
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}
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spin_unlock_irqrestore(&rq->lock, flags);
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break;
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#ifdef CONFIG_HOTPLUG_CPU
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@ -6103,6 +6105,8 @@ static void rq_attach_root(struct rq *rq, struct root_domain *rd)
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rq->rd = rd;
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cpu_set(rq->cpu, rd->span);
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if (cpu_isset(rq->cpu, cpu_online_map))
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cpu_set(rq->cpu, rd->online);
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for (class = sched_class_highest; class; class = class->next) {
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if (class->join_domain)
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