From 85f0ab43f9de62a4b9c1b503b07f1c33e5a6d2ab Mon Sep 17 00:00:00 2001 From: Juri Lelli Date: Tue, 16 Jan 2024 17:19:27 +0100 Subject: [PATCH] kernel/workqueue: Bind rescuer to unbound cpumask for WQ_UNBOUND At the time they are created unbound workqueues rescuers currently use cpu_possible_mask as their affinity, but this can be too wide in case a workqueue unbound mask has been set as a subset of cpu_possible_mask. Make new rescuers use their associated workqueue unbound cpumask from the start. Signed-off-by: Juri Lelli Signed-off-by: Tejun Heo --- kernel/workqueue.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 8d9dec14b9bb8..ed442cefea7c4 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -4652,7 +4652,10 @@ static int init_rescuer(struct workqueue_struct *wq) } wq->rescuer = rescuer; - kthread_bind_mask(rescuer->task, cpu_possible_mask); + if (wq->flags & WQ_UNBOUND) + kthread_bind_mask(rescuer->task, wq->unbound_attrs->cpumask); + else + kthread_bind_mask(rescuer->task, cpu_possible_mask); wake_up_process(rescuer->task); return 0; -- 2.30.2