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Message-Id: <1344874672-6257-2-git-send-email-js1304@gmail.com> Date: Tue, 14 Aug 2012 01:17:49 +0900 From: Joonsoo Kim <js1304@...il.com> To: Tejun Heo <tj@...nel.org> Cc: linux-kernel@...r.kernel.org, Joonsoo Kim <js1304@...il.com> Subject: [PATCH 2/5] workqueue: change value of lcpu in queue_delayed_work_on() We assign cpu id into work struct in queue_delayed_work_on(). In current implementation, when work is come in first time, current running cpu id is assigned. If we do queue_delayed_work_on() with CPU A on CPU B, __queue_work() invoked in delayed_work_timer_fn() go into sub-optimal path in case of WQ_NON_REENTRANT. Change it to cpu argument is prevent to go into sub-optimal path. Signed-off-by: Joonsoo Kim <js1304@...il.com> diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 188eef8..bc5c5e1 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -1158,6 +1158,8 @@ int queue_delayed_work_on(int cpu, struct workqueue_struct *wq, if (gcwq && gcwq->cpu != WORK_CPU_UNBOUND) lcpu = gcwq->cpu; + else if (cpu >= 0) + lcpu = cpu; else lcpu = raw_smp_processor_id(); } else -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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