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Date: Fri, 26 Jan 2024 11:57:41 -1000 From: Tejun Heo <tj@...nel.org> To: Lai Jiangshan <jiangshanlai@...il.com> Cc: linux-kernel@...r.kernel.org Subject: [PATCH wq/for-6.9] workqueue: Drop unnecessary kick_pool() in create_worker() >From 6a229b0e2ff6143b65ba4ef42bd71e29ffc2c16d Mon Sep 17 00:00:00 2001 From: Tejun Heo <tj@...nel.org> Date: Fri, 26 Jan 2024 11:55:46 -1000 After creating a new worker, create_worker() is calling kick_pool() to wake up the new worker task. However, as kick_pool() doesn't do anything if there is no work pending, it also calls wake_up_process() explicitly. There's no reason to call kick_pool() at all. wake_up_process() is enough by itself. Drop the unnecessary kick_pool() call. Signed-off-by: Tejun Heo <tj@...nel.org> --- Applied to wq/for-6.9. kernel/workqueue.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/kernel/workqueue.c b/kernel/workqueue.c index ee6aa1b897e0..b6b690a17f7c 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -2217,12 +2217,11 @@ static struct worker *create_worker(struct worker_pool *pool) worker->pool->nr_workers++; worker_enter_idle(worker); - kick_pool(pool); /* * @worker is waiting on a completion in kthread() and will trigger hung - * check if not woken up soon. As kick_pool() might not have waken it - * up, wake it up explicitly once more. + * check if not woken up soon. As kick_pool() is noop if @pool is empty, + * wake it up explicitly. */ wake_up_process(worker->task); -- 2.43.0
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