linux-kernel - [PATCH 2/2] workqueues: schedule_on_each_cpu: use flush

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Date:	Fri, 13 Jun 2008 18:28:04 +0400
From:	Oleg Nesterov <oleg@...sign.ru>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Jarek Poplawski <jarkao2@...pl>,
	Max Krasnyansky <maxk@...lcomm.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] workqueues: schedule_on_each_cpu: use flush_work()

Change schedule_on_each_cpu() to use flush_work() instead of flush_workqueue(),
this way we don't wait for other work_struct's which can be queued meanwhile.

Signed-off-by: Oleg Nesterov <oleg@...sign.ru>

--- 26-rc2/kernel/workqueue.c~WQ_3_USE_FLUSH_WORK	2008-06-13 17:31:54.000000000 +0400
+++ 26-rc2/kernel/workqueue.c	2008-06-13 17:34:05.000000000 +0400
@@ -653,7 +653,8 @@ int schedule_on_each_cpu(work_func_t fun
 		set_bit(WORK_STRUCT_PENDING, work_data_bits(work));
 		__queue_work(per_cpu_ptr(keventd_wq->cpu_wq, cpu), work);
 	}
-	flush_workqueue(keventd_wq);
+	for_each_online_cpu(cpu)
+		flush_work(per_cpu_ptr(works, cpu));
 	put_online_cpus();
 	free_percpu(works);
 	return 0;

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