[PATCH v3 6/6] workqueue: use system_highpri_wq for unbind_work

[Joonsoo Kim]

To speed cpu down processing up, use system_highpri_wq.
As scheduling priority of workers on it is higher than system_wq and
it is not contended by other normal works on this cpu, work on it
is processed faster than system_wq.

Signed-off-by: Joonsoo Kim <js1304@xxxxxxxxx>

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 2945734..e17326e 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -3679,7 +3679,7 @@ static int __devinit workqueue_cpu_down_callback(struct notifier_block *nfb,
 	case CPU_DOWN_PREPARE:
 		/* unbinding should happen on the local CPU */
 		INIT_WORK_ONSTACK(&unbind_work, gcwq_unbind_fn);
-		schedule_work_on(cpu, &unbind_work);
+		queue_work_on(cpu, system_highpri_wq, &unbind_work);
 		flush_work(&unbind_work);
 		break;
 	}
-- 
1.7.9.5

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