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authorGregory Haskins <ghaskins@novell.com>2008-03-10 16:52:41 -0400
committerIngo Molnar <mingo@elte.hu>2008-03-11 14:02:58 +0100
commit1f94ef598e8d29b92b9fc85d43c832e03721d3cb (patch)
treef9573663c4bb83a9af4d17b90c174869b50ba2b1 /kernel
parent2f44bbb495dd3e6d0209eff2257438ab9c570e5b (diff)
Revert "cpu hotplug: adjust root-domain->online span in response to hotplug event"
This reverts commit 393d94d98b19089ec172566e23557997931b137e. 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>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index b02e4fc25645..52b98675acb2 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -5813,13 +5813,6 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
/* Must be high prio: stop_machine expects to yield to it. */
rq = task_rq_lock(p, &flags);
__setscheduler(rq, p, SCHED_FIFO, MAX_RT_PRIO-1);
-
- /* Update our root-domain */
- if (rq->rd) {
- BUG_ON(!cpu_isset(cpu, rq->rd->span));
- cpu_set(cpu, rq->rd->online);
- }
-
task_rq_unlock(rq, &flags);
cpu_rq(cpu)->migration_thread = p;
break;
@@ -5828,6 +5821,15 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
case CPU_ONLINE_FROZEN:
/* Strictly unnecessary, as first user will wake it. */
wake_up_process(cpu_rq(cpu)->migration_thread);
+
+ /* Update our root-domain */
+ rq = cpu_rq(cpu);
+ spin_lock_irqsave(&rq->lock, flags);
+ if (rq->rd) {
+ BUG_ON(!cpu_isset(cpu, rq->rd->span));
+ cpu_set(cpu, rq->rd->online);
+ }
+ spin_unlock_irqrestore(&rq->lock, flags);
break;
#ifdef CONFIG_HOTPLUG_CPU
@@ -6103,6 +6105,8 @@ static void rq_attach_root(struct rq *rq, struct root_domain *rd)
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)

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