[PATCH 5/5] 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 <js1...@gmail.com>

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index e0e1d41..5d50955 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -3501,7 +3501,7 @@ 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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