linux-kernel - Re: [PATCH] workqueue: Use wake_up_worker() to wake up first idle worker

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Date:   Mon, 24 Aug 2020 12:00:45 +0000
From:   linmiaohe <linmiaohe@...wei.com>
To:     "tj@...nel.org" <tj@...nel.org>,
        "jiangshanlai@...il.com" <jiangshanlai@...il.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] workqueue: Use wake_up_worker() to wake up first idle
 worker

friendly ping :)

>Miaohe Lin <linmiaohe@...wei.com> wrote:
>From: Miaohe Lin <linmiaohe@...wei.com>
>
>Use wrapper function wake_up_worker() to wake up first idle worker.
>
>Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
>---
> kernel/workqueue.c | 10 ++++------
> 1 file changed, 4 insertions(+), 6 deletions(-)
>
>diff --git a/kernel/workqueue.c b/kernel/workqueue.c index c41c3c17b86a..5302f227f38f 100644
>--- a/kernel/workqueue.c
>+++ b/kernel/workqueue.c
>@@ -864,7 +864,7 @@ void wq_worker_running(struct task_struct *task)
>  */
> void wq_worker_sleeping(struct task_struct *task)  {
>-	struct worker *next, *worker = kthread_data(task);
>+	struct worker *worker = kthread_data(task);
> 	struct worker_pool *pool;
> 
> 	/*
>@@ -896,11 +896,9 @@ void wq_worker_sleeping(struct task_struct *task)
> 	 * lock is safe.
> 	 */
> 	if (atomic_dec_and_test(&pool->nr_running) &&
>-	    !list_empty(&pool->worklist)) {
>-		next = first_idle_worker(pool);
>-		if (next)
>-			wake_up_process(next->task);
>-	}
>+	    !list_empty(&pool->worklist))
>+		wake_up_worker(pool);
>+
> 	raw_spin_unlock_irq(&pool->lock);
> }
> 
>--
>2.19.1
>